ath10k: htt: remove array of flexible structures

I updated to sparse v0.6.4 and it warns:

drivers/net/wireless/ath/ath10k/hw.c: note: in included file (through drivers/net/wireless/ath/ath10k/core.h):
drivers/net/wireless/ath/ath10k/htt.h:1503:41: warning: array of flexible structures
drivers/net/wireless/ath/ath10k/htt_rx.c: note: in included file (through drivers/net/wireless/ath/ath10k/core.h):
drivers/net/wireless/ath/ath10k/htt.h:1503:41: warning: array of flexible structures

The structure is unused in ath10k so let's just remove it.

Compile tested only.
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20211209091545.6098-1-kvalo@kernel.org

drivers/net/wireless/ath/ath10k/htt.h

@@ -1400,115 +1400,6 @@ enum htt_dbg_stats_status {
 	HTT_DBG_STATS_STATUS_SERIES_DONE = 7
 };
 
-/*
- * target -> host statistics upload
- *
- * The following field definitions describe the format of the HTT target
- * to host stats upload confirmation message.
- * The message contains a cookie echoed from the HTT host->target stats
- * upload request, which identifies which request the confirmation is
- * for, and a series of tag-length-value stats information elements.
- * The tag-length header for each stats info element also includes a
- * status field, to indicate whether the request for the stat type in
- * question was fully met, partially met, unable to be met, or invalid
- * (if the stat type in question is disabled in the target).
- * A special value of all 1's in this status field is used to indicate
- * the end of the series of stats info elements.
- *
- *
- * |31                         16|15           8|7   5|4       0|
- * |------------------------------------------------------------|
- * |                  reserved                  |    msg type   |
- * |------------------------------------------------------------|
- * |                        cookie LSBs                         |
- * |------------------------------------------------------------|
- * |                        cookie MSBs                         |
- * |------------------------------------------------------------|
- * |      stats entry length     |   reserved   |  S  |stat type|
- * |------------------------------------------------------------|
- * |                                                            |
- * |                  type-specific stats info                  |
- * |                                                            |
- * |------------------------------------------------------------|
- * |      stats entry length     |   reserved   |  S  |stat type|
- * |------------------------------------------------------------|
- * |                                                            |
- * |                  type-specific stats info                  |
- * |                                                            |
- * |------------------------------------------------------------|
- * |              n/a            |   reserved   | 111 |   n/a   |
- * |------------------------------------------------------------|
- * Header fields:
- *  - MSG_TYPE
- *    Bits 7:0
- *    Purpose: identifies this is a statistics upload confirmation message
- *    Value: 0x9
- *  - COOKIE_LSBS
- *    Bits 31:0
- *    Purpose: Provide a mechanism to match a target->host stats confirmation
- *        message with its preceding host->target stats request message.
- *    Value: LSBs of the opaque cookie specified by the host-side requestor
- *  - COOKIE_MSBS
- *    Bits 31:0
- *    Purpose: Provide a mechanism to match a target->host stats confirmation
- *        message with its preceding host->target stats request message.
- *    Value: MSBs of the opaque cookie specified by the host-side requestor
- *
- * Stats Information Element tag-length header fields:
- *  - STAT_TYPE
- *    Bits 4:0
- *    Purpose: identifies the type of statistics info held in the
- *        following information element
- *    Value: htt_dbg_stats_type
- *  - STATUS
- *    Bits 7:5
- *    Purpose: indicate whether the requested stats are present
- *    Value: htt_dbg_stats_status, including a special value (0x7) to mark
- *        the completion of the stats entry series
- *  - LENGTH
- *    Bits 31:16
- *    Purpose: indicate the stats information size
- *    Value: This field specifies the number of bytes of stats information
- *       that follows the element tag-length header.
- *       It is expected but not required that this length is a multiple of
- *       4 bytes.  Even if the length is not an integer multiple of 4, the
- *       subsequent stats entry header will begin on a 4-byte aligned
- *       boundary.
- */
-
-#define HTT_STATS_CONF_ITEM_INFO_STAT_TYPE_MASK 0x1F
-#define HTT_STATS_CONF_ITEM_INFO_STAT_TYPE_LSB  0
-#define HTT_STATS_CONF_ITEM_INFO_STATUS_MASK    0xE0
-#define HTT_STATS_CONF_ITEM_INFO_STATUS_LSB     5
-
-struct htt_stats_conf_item {
-	union {
-		u8 info;
-		struct {
-			u8 stat_type:5; /* %HTT_DBG_STATS_ */
-			u8 status:3; /* %HTT_DBG_STATS_STATUS_ */
-		} __packed;
-	} __packed;
-	u8 pad;
-	__le16 length;
-	u8 payload[]; /* roundup(length, 4) long */
-} __packed;
-
-struct htt_stats_conf {
-	u8 pad[3];
-	__le32 cookie_lsb;
-	__le32 cookie_msb;
-
-	/* each item has variable length! */
-	struct htt_stats_conf_item items[];
-} __packed;
-
-static inline struct htt_stats_conf_item *htt_stats_conf_next_item(
-					const struct htt_stats_conf_item *item)
-{
-	return (void *)item + sizeof(*item) + roundup(item->length, 4);
-}
-
 /*
  * host -> target FRAG DESCRIPTOR/MSDU_EXT DESC bank
  *
@@ -1828,7 +1719,6 @@ struct htt_resp {
 		struct htt_rc_update rc_update;
 		struct htt_rx_test rx_test;
 		struct htt_pktlog_msg pktlog_msg;
-		struct htt_stats_conf stats_conf;
 		struct htt_rx_pn_ind rx_pn_ind;
 		struct htt_rx_offload_ind rx_offload_ind;
 		struct htt_rx_in_ord_ind rx_in_ord_ind;