drm/connector: store tile information from displayid (v3)

This creates a tile group from DisplayID block, and
stores the pieces of parsed info from the DisplayID block
into the connector.

v2: add missing signoff, add new connector bits to docs.

v3: remove some debugging.

Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --cc drivers/gpu/drm/drm_crtc.c
Simple merge

diff --cc drivers/gpu/drm/drm_edid.c
Simple merge

diff --cc include/drm/drm_crtc.h
Simple merge