media: atmel: atmel-isc-base: remove unneeded semicolon

Eliminate the following coccicheck warning:
./drivers/media/platform/atmel/atmel-isc-base.c:1469:2-3: Unneeded
semicolon

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>