mwifiex: Removed unused 'pkt_type' variable

Commit 92263a84 introduced mwifiex_deaggr_sdio_pkt which initializes
variable pkt_type but does not use it. Compiling with W=1 gives the following
warning, fix it.
mwifiex/sdio.c: In function ‘mwifiex_deaggr_sdio_pkt’:
mwifiex/sdio.c:1198:6: warning: variable ‘pkt_type’ set but not used [-Wunused-but-set-variable]

Fixes: 92263a84 ("mwifiex: add SDIO rx single port aggregation")
Cc: Zhaoyang Liu <liuzy@marvell.com>
Cc: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Kirtika Ruchandani <kirtika@google.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/marvell/mwifiex/sdio.c

@@ -1135,7 +1135,6 @@ static void mwifiex_deaggr_sdio_pkt(struct mwifiex_adapter *adapter,
 {
 	u32 total_pkt_len, pkt_len;
 	struct sk_buff *skb_deaggr;
-	u32 pkt_type;
 	u16 blk_size;
 	u8 blk_num;
 	u8 *data;
@@ -1156,8 +1155,6 @@ static void mwifiex_deaggr_sdio_pkt(struct mwifiex_adapter *adapter,
 			break;
 		}
 		pkt_len = le16_to_cpu(*(__le16 *)(data + SDIO_HEADER_OFFSET));
-		pkt_type = le16_to_cpu(*(__le16 *)(data + SDIO_HEADER_OFFSET +
-					 2));
 		if ((pkt_len + SDIO_HEADER_OFFSET) > blk_size) {
 			mwifiex_dbg(adapter, ERROR,
 				    "%s: error in pkt_len,\t"