msm: vidc: Add Colorspace in sequence change event

For HDR playback, the userspace needs info on the
colorspace info for DPB decision. Venus firmware
sends a color space info to the driver with the port
settings changed event, which is triggered as an
insufficient event to userpace if colorspace changes.

CRs-Fixed: 1081102
Change-Id: I9665dfc1c52d77dc8953042101d726e7f7ba1807
Signed-off-by: Umesh Pandey <umeshp@codeaurora.org>