drm/edid: Don't pass around drm_display_info needlessly

We already pass the connector to drm_add_display_info() and
drm_assign_hdmi_deep_color_info(), so passing the
connector->display_info also is pointless.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1475070703-6435-6-git-send-email-ville.syrjala@linux.intel.com