media: coda: never set infinite timeperframe

v4l2-compliance complains if G_PARM returns 0 in the denominator.

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