media: gspca: cpia1: Use min macro

Simplifies the code.

Found by cocci:
drivers/media/usb/gspca/cpia1.c:607:30-31: WARNING opportunity for min()

Link: https://lore.kernel.org/linux-media/20240429-fix-cocci-v3-18-3c4865f5a4b0@chromium.org
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

Author: ribalda

drivers/media/usb/gspca/cpia1.c

@@ -604,10 +604,8 @@ static int find_over_exposure(int brightness)
 	MaxAllowableOverExposure = FLICKER_MAX_EXPOSURE - brightness -
 				   FLICKER_BRIGHTNESS_CONSTANT;
 
-	if (MaxAllowableOverExposure < FLICKER_ALLOWABLE_OVER_EXPOSURE)
-		OverExposure = MaxAllowableOverExposure;
-	else
-		OverExposure = FLICKER_ALLOWABLE_OVER_EXPOSURE;
+	OverExposure = min(MaxAllowableOverExposure,
+			   FLICKER_ALLOWABLE_OVER_EXPOSURE);
 
 	return OverExposure;
 }