msm: add camera use flags for NV12 and R8

msm: add camera use flags for NV12 and R8

NV12 is used by the camera stack for YUV buffers. R8 is used by the
camera stack as a blob format for JPEG images.

BUG=b:148152367
TEST=Manually with built-in camera app on Cheza

Change-Id: I484f1a5ede2dfece549706310d832086af087544
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/minigbm/+/2053665
Tested-by: Ricky Liang <jcliang@chromium.org>
Commit-Queue: Ricky Liang <jcliang@chromium.org>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>