drm: add support for parsing HDR10+ EDID data

Add EDID parsing for sinks supporting HDR10+. Store the
application version code indicating the display's HDR10+
support in the drm_connector for sub-driver use.

Change-Id: Icfb65f8bbf6acb1c86fae90faa1a227997d4ab01
Signed-off-by: Steve Cohen <cohens@codeaurora.org>