drm: Rename HDMI colorspace property creation function

As between HDMI and DP have different colorspaces, in order to distinguish
colorspace of DP and HDMI, it renames drm_mode_create_colorspace_property()
function to drm_mode_create_hdmi_colorspace_property() function for HDMI
connector.
In order to apply changed drm api, i915 driver has channged.

It addresses review comments from Ville.
 - Split hunk into renaming and adding of code.

Change-Id: I4dc4b5e46ec52dd0e3f3970901c4149e5f295c69
Link: https://patchwork.freedesktop.org/patch/msgid/20190919195311.13972-4-gwan-gyeong.mun@intel.com
Git-commit: 8806cd3aa025ad9351678e7b8377080dec1315a9
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Signed-off-by: Tatenda Chipeperekwa <tatendac@codeaurora.org>