SPU2: ADMA fix for Vice City

TFW you revert using the wrong variable..

pcsx2/SPU2/spu2sys.cpp

@@ -1521,7 +1521,7 @@ static void __fastcall RegWrite_Core(u16 value)
 			thiscore.AutoDMACtrl = value;
 			if (value == 0 && thiscore.AdmaInProgress && (thiscore.Regs.STATX & 0x400))
 			{
-				thiscore.InputDataProgress = 0;
+				thiscore.AdmaInProgress = 0;
 				thiscore.Regs.STATX &= ~0x400; // Set DMA as not busy transferring
 				// No need to end the DMA here, the IOP seems to handle that
 			}