Staging: rtl8723au: fix space coding style issue in os_intfs.c

This patch fixes the checkpatch.pl warning:

WARNING: space prohibited before semicolon
Signed-off-by: NPeter Poklop <peter.poklop@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723au/os_dep/os_intfs.c

@@ -91,7 +91,7 @@ static int rtw_bt_iso = 2;/*  0:Low, 1:High, 2:From Efuse */
 /*  0:Idle, 1:None-SCO, 2:SCO, 3:From Counter, 4.Busy, 5.OtherBusy */
 static int rtw_bt_sco = 3;
 /*  0:Disable BT control A-MPDU, 1:Enable BT control A-MPDU. */
-static int rtw_bt_ampdu = 1 ;
+static int rtw_bt_ampdu = 1;
 #endif
 
 /*  0:Reject AP's Add BA req, 1:Accept AP's Add BA req. */