media: coda: remove mask from decoder h.264 level control

Since levels are specified in terms of maximum values, there is no
reason to filter out lower levels than the supported maximum.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>