staging/xgifb: Remove unused variable

After the patch
'staging/xgifb: Don't write the same values x times'
the local variable i is unused, which leads to the following warning:

driverrs/staging/xgifb/vb_init.c: In function
‘XGINew_SetDRAMDefaultRegister340’:
drivers/staging/xgifb/vb_init.c:433:43: warning: unused variable ‘i’
[-Wunused-variable]

This patch fixes this
Signed-off-by: NPeter Huewe <peterhuewe@gmx.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/xgifb/vb_init.c

@@ -430,7 +430,7 @@ static void XGINew_SetDRAMDefaultRegister340(
 		struct xgi_hw_device_info *HwDeviceExtension,
 		unsigned long Port, struct vb_device_info *pVBInfo)
 {
-	unsigned char temp, temp1, temp2, temp3, i, j, k;
+	unsigned char temp, temp1, temp2, temp3, j, k;
 
 	unsigned long P3d4 = Port, P3c4 = Port - 0x10;