drm/msm/sde: Add chromaticity values for HDR support

Add WRGB chromaticity values, peak brightness and blackness
level to panel information. This change also adds method to
parse these parameters from device tree and exposes them as
connector property.

Change-Id: I30dcebed85406a933afd007e56014c668901459e
Signed-off-by: Ping Li <pingli@codeaurora.org>