drm/msm: pass the HDR metadata sent from userspace to sink

Use metadata information sent from userspace to configure sink.

This info shall be used later on to program the HDMI specific
infoframe registers.

Change-Id: I26634452d8c3ab7ab49a65e89ad52a3961c64855
Signed-off-by: Abhinav Kumar <abhinavk@codeaurora.org>