staging: vt6656: CARDqGetNextTBTT correct uLowNextTBTT

value uLowNextTBTT yields wrong value.

ULL is needed with qwTSF
Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Cc: stable@vger.kernel.org # v3.9+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vt6656/card.c

@@ -727,7 +727,7 @@ u64 CARDqGetNextTBTT(u64 qwTSF, u16 wBeaconInterval)
 
     uBeaconInterval = wBeaconInterval * 1024;
     // Next TBTT = ((local_current_TSF / beacon_interval) + 1 ) * beacon_interval
-	uLowNextTBTT = ((qwTSF & 0xffffffffU) >> 10) << 10;
+	uLowNextTBTT = ((qwTSF & 0xffffffffULL) >> 10) << 10;
 	uLowRemain = (uLowNextTBTT) % uBeaconInterval;
 	uHighRemain = ((0x80000000 % uBeaconInterval) * 2 * (u32)(qwTSF >> 32))
 		% uBeaconInterval;