mm-video-v4l2: vdec: Override client primaries only for >=UHD

There are few compliance tests which sets for color primaries
and checks the color primaries received. At the same time,
IL client enforces BT2020 for UHD and higher. To allow the
flexibility for tests to choose the color space, allow
client specified color space for lower resolutions.

Change-Id: I695cea420439cf048f9a87446cc22d059780f9fe
1 file changed