media: cx231xx: Remove unneeded semicolon

Fixes coccicheck warnings:

drivers/media/usb/cx231xx/cx231xx-avcore.c:610:3-4: Unneeded semicolon
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zou Wei <zou_wei@huawei.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/usb/cx231xx/cx231xx-avcore.c

@@ -607,7 +607,7 @@ int cx231xx_set_video_input_mux(struct cx231xx *dev, u8 input)
 							CX231XX_VMUX_COMPOSITE1,
 							INPUT(input)->vmux);
 			break;
-		};
+		}
 
 		break;
 	default: