staging: wfx: better naming for hif_req_join->short_preamble

HIF_PREAMBLE_SHORT_LONG12 is never used. So it is possible to change
"preamble_type" into a boolean and drop "enum hif_preamble".
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20191217161318.31402-28-Jerome.Pouiller@silabs.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wfx/hif_api_cmd.h

@@ -377,12 +377,6 @@ struct hif_cnf_edca_queue_params {
 	u32   status;
 } __packed;
 
-enum hif_preamble {
-	HIF_PREAMBLE_LONG                          = 0x0,
-	HIF_PREAMBLE_SHORT                         = 0x1,
-	HIF_PREAMBLE_SHORT_LONG12                  = 0x2
-};
-
 struct hif_join_flags {
 	u8    reserved1:2;
 	u8    force_no_beacon:1;
@@ -397,9 +391,10 @@ struct hif_req_join {
 	u16   channel_number;
 	u8    bssid[ETH_ALEN];
 	u16   atim_window;
-	u8    preamble_type;
+	u8    short_preamble:1;
+	u8    reserved2:7;
 	u8    probe_for_join;
-	u8    reserved;
+	u8    reserved3;
 	struct hif_join_flags join_flags;
 	u32   ssid_length;
 	u8    ssid[HIF_API_SSID_SIZE];
@@ -462,8 +457,9 @@ struct hif_req_start {
 	u32   reserved1;
 	u32   beacon_interval;
 	u8    dtim_period;
-	u8    preamble_type;
-	u8    reserved2;
+	u8    short_preamble:1;
+	u8    reserved2:7;
+	u8    reserved3;
 	u8    ssid_length;
 	u8    ssid[HIF_API_SSID_SIZE];
 	u32   basic_rate_set;

drivers/staging/wfx/hif_api_mib.h

@@ -471,8 +471,9 @@ struct hif_mib_set_association_mode {
 	u8    mode:1;
 	u8    rateset:1;
 	u8    spacing:1;
-	u8    reserved:4;
-	u8    preamble_type;
+	u8    reserved1:4;
+	u8    short_preamble:1;
+	u8    reserved2:7;
 	u8    mixed_or_greenfield_type;
 	u8    mpdu_start_spacing;
 	u32   basic_rate_set;

drivers/staging/wfx/sta.c

@@ -652,7 +652,7 @@ static void wfx_do_join(struct wfx_vif *wvif)
 	struct cfg80211_bss *bss = NULL;
 	struct hif_req_join join = {
 		.infrastructure_bss_mode = !conf->ibss_joined,
-		.preamble_type = conf->use_short_preamble ? HIF_PREAMBLE_SHORT : HIF_PREAMBLE_LONG,
+		.short_preamble = conf->use_short_preamble,
 		.probe_for_join = 1,
 		.atim_window = 0,
 		.basic_rate_set = wfx_rate_mask_to_hw(wvif->wdev,
@@ -843,7 +843,7 @@ static int wfx_start_ap(struct wfx_vif *wvif)
 		.channel_number = wvif->channel->hw_value,
 		.beacon_interval = conf->beacon_int,
 		.dtim_period = conf->dtim_period,
-		.preamble_type = conf->use_short_preamble ? HIF_PREAMBLE_SHORT : HIF_PREAMBLE_LONG,
+		.short_preamble = conf->use_short_preamble,
 		.basic_rate_set = wfx_rate_mask_to_hw(wvif->wdev,
 						      conf->basic_rates),
 	};
@@ -994,7 +994,7 @@ static void wfx_join_finalize(struct wfx_vif *wvif,
 	association_mode.mode = 1;
 	association_mode.rateset = 1;
 	association_mode.spacing = 1;
-	association_mode.preamble_type = info->use_short_preamble ? HIF_PREAMBLE_SHORT : HIF_PREAMBLE_LONG;
+	association_mode.short_preamble = info->use_short_preamble;
 	association_mode.basic_rate_set = cpu_to_le32(wfx_rate_mask_to_hw(wvif->wdev, info->basic_rates));
 	association_mode.mixed_or_greenfield_type = wfx_ht_greenfield(&wvif->ht_info);
 	association_mode.mpdu_start_spacing = wfx_ht_ampdu_density(&wvif->ht_info);