media: omap3isp: better VIDIOC_G/S_PARM handling

media: omap3isp: better VIDIOC_G/S_PARM handling

Fix various v4l2-compliance errors relating to timeperframe.

VIDIOC_G/S_PARM is only supported for Video Output, so disable
these ioctls for Capture devices.

Ensure numerator and denominator are never 0.

Set missing V4L2_CAP_TIMEPERFRAME capability for VIDIOC_S_PARM.

v4l2-compliance:

	fail: v4l2-test-formats.cpp(1388): out->timeperframe.numerator == 0 || out->timeperframe.denominator == 0
test VIDIOC_G/S_PARM: FAIL

Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>