staging: wilc1000: destroy initialized mutex object

A mutex object that is initialized but not destroyed.This patch destroys
the mutex object

Signed-off-by: HariPrasath Elango <hariprasath.elango@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wilc1000/wilc_wfi_cfgoperations.c

@@ -2310,6 +2310,7 @@ int wilc_deinit_host_int(struct net_device *net)
 
 	op_ifcs--;
 
+	mutex_destroy(&priv->scan_req_lock);
 	ret = wilc_deinit(vif);
 
 	clear_shadow_scan();