staging: wilc1000: remove return type of Handle_wait_msg_q_empty

This patch changes return type of Handle_wait_msg_q_empty from s32 with void
because return value is not used.
Signed-off-by: Leo Kim <leo.kim@atmel.com>
Signed-off-by: Glen Lee <glen.lee@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wilc1000/host_interface.c

@@ -813,11 +813,10 @@ static s32 Handle_CfgParam(struct host_if_drv *hif_drv,
 	return result;
 }
 
-static s32 Handle_wait_msg_q_empty(void)
+static void Handle_wait_msg_q_empty(void)
 {
 	g_wilc_initialized = 0;
 	up(&hif_sema_wait_response);
-	return 0;
 }
 
 static s32 Handle_Scan(struct host_if_drv *hif_drv,