staging: wilc1000: remove set but not used variable 'msa'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/staging/wilc1000/host_interface.c: In function 'wilc_parse_network_info':
drivers/staging/wilc1000/host_interface.c:748:16: warning:
 variable 'msa' set but not used [-Wunused-but-set-variable]
Signed-off-by: NYueHaibing <yuehaibing@huawei.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wilc1000/host_interface.c

@@ -745,7 +745,7 @@ static s32 wilc_parse_network_info(u8 *msg_buffer,
 {
 	struct network_info *info;
 	struct ieee80211_mgmt *mgt;
-	u8 *wid_val, *msa, *ies;
+	u8 *wid_val, *ies;
 	u16 wid_len, rx_len, ies_len;
 	u8 msg_type;
 	size_t offset;
@@ -764,7 +764,6 @@ static s32 wilc_parse_network_info(u8 *msg_buffer,
 
 	info->rssi = wid_val[0];
 
-	msa = &wid_val[1];
 	mgt = (struct ieee80211_mgmt *)&wid_val[1];
 	rx_len = wid_len - 1;