ASoC: SOF: Remove SOF_IPC_EXT_DMA_BUFFER

This enum code, and what's more important, related structures is
unused in whole source code, so it shouldn't be kept.
Signed-off-by: Karol Trzcinski <karolx.trzcinski@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200312200622.24477-4-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

include/sound/sof/info.h

@@ -28,7 +28,7 @@
 
 /* extended data types that can be appended onto end of sof_ipc_fw_ready */
 enum sof_ipc_ext_data {
-	SOF_IPC_EXT_DMA_BUFFER		= 0,
+	SOF_IPC_EXT_UNUSED		= 0,
 	SOF_IPC_EXT_WINDOW		= 1,
 	SOF_IPC_EXT_CC_INFO		= 2,
 };
@@ -83,22 +83,6 @@ struct sof_ipc_ext_data_hdr {
 	uint32_t type;		/**< SOF_IPC_EXT_ */
 } __packed;
 
-struct sof_ipc_dma_buffer_elem {
-	struct sof_ipc_hdr hdr;
-	uint32_t type;		/**< SOF_IPC_REGION_ */
-	uint32_t id;		/**< platform specific - used to map to host memory */
-	struct sof_ipc_host_buffer buffer;
-} __packed;
-
-/* extended data DMA buffers for IPC, trace and debug */
-struct sof_ipc_dma_buffer_data {
-	struct sof_ipc_ext_data_hdr ext_hdr;
-	uint32_t num_buffers;
-
-	/* host files in buffer[n].buffer */
-	struct sof_ipc_dma_buffer_elem buffer[];
-}  __packed;
-
 struct sof_ipc_window_elem {
 	struct sof_ipc_hdr hdr;
 	uint32_t type;		/**< SOF_IPC_REGION_ */

sound/soc/sof/loader.c

@@ -95,9 +95,6 @@ int snd_sof_fw_parse_ext_data(struct snd_sof_dev *sdev, u32 bar, u32 offset)
 
 		/* process structure data */
 		switch (ext_hdr->type) {
-		case SOF_IPC_EXT_DMA_BUFFER:
-			ret = 0;
-			break;
 		case SOF_IPC_EXT_WINDOW:
 			ret = get_ext_windows(sdev, ext_hdr);
 			break;

sound/soc/sof/sof-priv.h

@@ -415,7 +415,6 @@ struct snd_sof_dev {
 	u32 enabled_cores_mask; /* keep track of enabled cores */
 
 	/* FW configuration */
-	struct sof_ipc_dma_buffer_data *info_buffer;
 	struct sof_ipc_window *info_window;
 
 	/* IPC timeouts in ms */