drm/modes: remove drm_mode_height/width

There's a neat FIXME asking whether this is really need. I'd
say really no.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

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

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

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

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