ath6kl: read reserved ram size from firmware file

A new version of firmware needs different reserved ram size so read that
from the firmware image.
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath6kl/core.h

@@ -67,6 +67,7 @@ enum ath6kl_fw_ie_type {
 	ATH6KL_FW_IE_OTP_IMAGE = 2,
 	ATH6KL_FW_IE_FW_IMAGE = 3,
 	ATH6KL_FW_IE_PATCH_IMAGE = 4,
+	ATH6KL_FW_IE_RESERVED_RAM_SIZE = 5,
 };
 
 struct ath6kl_fw_ie {

drivers/net/wireless/ath/ath6kl/init.c

@@ -902,6 +902,7 @@ static int ath6kl_fetch_fw_api2(struct ath6kl *ar)
 	const char *filename;
 	const u8 *data;
 	int ret, ie_id;
+	__le32 *val;
 
 	switch (ar->version.target_ver) {
 	case AR6003_REV2_VERSION:
@@ -987,6 +988,10 @@ static int ath6kl_fetch_fw_api2(struct ath6kl *ar)
 
 			ar->fw_patch_len = ie_len;
 			break;
+		case ATH6KL_FW_IE_RESERVED_RAM_SIZE:
+			val = (__le32 *) data;
+			ar->hw.reserved_ram_size = le32_to_cpup(val);
+			break;
 		default:
 			ath6kl_dbg(ATH6KL_DBG_TRC, "Unknown fw ie: %u\n",
 				   le32_to_cpup(&hdr->id));