media: staging:hantro: Fixed "replace comma with semicolon" Warning

Corrected the following Warning:
drivers/staging/media/hantro/hantro_v4l2.c:319: WARNING: Possible comma where semicolon could be used

Signed-off-by: Travis Carter <traviscarter2@gmail.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>