mwifiex: fix sparse warning

This patch fixes following sparse warnings:

drivers/net/wireless/mwifiex/util.c:152:19: warning: cast from restricted __le16
drivers/net/wireless/mwifiex/util.c:152:19: warning: restricted __le16 degrades to integer
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/mwifiex/util.c

@@ -149,7 +149,7 @@ mwifiex_parse_mgmt_packet(struct mwifiex_private *priv, u8 *payload, u16 len,
 	u8 category, action_code;
 	struct ieee80211_hdr *ieee_hdr = (void *)payload;
 
-	stype =  (cpu_to_le16(ieee_hdr->frame_control) & IEEE80211_FCTL_STYPE);
+	stype = (le16_to_cpu(ieee_hdr->frame_control) & IEEE80211_FCTL_STYPE);
 
 	switch (stype) {
 	case IEEE80211_STYPE_ACTION: