staging: rtl8712: delete one space before if statement

This patch fixed minor checkpatch warning:

WARNING: Statements should start on a tabstop
Signed-off-by: Louie Lu <louie.lu@hopebaytech.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8712/os_intfs.c

@@ -425,7 +425,7 @@ static int netdev_open(struct net_device *pnetdev)
 	else
 		netif_wake_queue(pnetdev);
 
-	 if (video_mode)
+	if (video_mode)
 		enable_video_mode(padapter, cbw40_enable);
 	/* start driver mlme relation timer */
 	start_drv_timers(padapter);