sdm: drm: Support back to back HDR playback

Fix the state machine handling to cover the case where there are two
consecutive HDR video playbacks with not enough non-HDR frames in
between to reset the HDR metadata. In this case, continue sending
the HDR metadata of the new HDR video.

CRs-Fixed: 2143509
Change-Id: Icff7ff936f8fc7719166a2ccb55051564e2ea761
1 file changed