video: fbdev: kyrofb: remove set but not used variable 'ulScaleRight'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/video/fbdev/kyro/STG4000OverlayDevice.c: In function
‘SetOverlayViewPort’:
drivers/video/fbdev/kyro/STG4000OverlayDevice.c:334:19: warning:
variable ‘ulScaleRight’ set but not used [-Wunused-but-set-variable]

It is never used, and so can be removed.
Signed-off-by: yu kuai <yukuai3@huawei.com>
Cc: zhengbin <zhengbin13@huawei.com>
Cc: yi.zhang <yi.zhang@huawei.com>
[b.zolnierkie: minor patch summary fixup]
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200119121945.12517-1-yukuai3@huawei.com

drivers/video/fbdev/kyro/STG4000OverlayDevice.c

@@ -331,7 +331,7 @@ int SetOverlayViewPort(volatile STG4000REG __iomem *pSTGReg,
 	u32 ulScale;
 	u32 ulLeft, ulRight;
 	u32 ulSrcLeft, ulSrcRight;
-	u32 ulScaleLeft, ulScaleRight;
+	u32 ulScaleLeft;
 	u32 ulhDecim;
 	u32 ulsVal;
 	u32 ulVertDecFactor;
@@ -470,7 +470,6 @@ int SetOverlayViewPort(volatile STG4000REG __iomem *pSTGReg,
 		 * round down the pixel pos to the nearest 8 pixels.
 		 */
 		ulScaleLeft = ulSrcLeft;
-		ulScaleRight = ulSrcRight;
 
 		/* shift fxscale until it is in the range of the scaler */
 		ulhDecim = 0;