This makes it easy to determine if a format is YUV. The old
method of using chroma sample type incorrectly marks YUV444 as
RGB format.
Signed-off-by: NWentao Xu <wentaox@codeaurora.org>
[rebase]
Signed-off-by: NStephane Viau <sviau@codeaurora.org>
Signed-off-by: NRob Clark <robdclark@gmail.com>