staging: wilc1000: Destroy mutex object in deinitialization

Destroy the mutex object that is initialized in wlan_init_locks()
Signed-off-by: HariPrasath Elango <hariprasath.elango@gmail.com>
Reviewed-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wilc1000/linux_wlan.c

@@ -678,6 +678,7 @@ static int wlan_deinit_locks(struct net_device *dev)
 
 	mutex_destroy(&wilc->hif_cs);
 	mutex_destroy(&wilc->rxq_cs);
+	mutex_destroy(&wilc->txq_add_to_head_cs);
 
 	return 0;
 }