drm/i915 fixes for 4.14-rc5: Three fixes for stable: - Use crtc_state_is_legacy_gamma in intel_color_check (Maarten) - Read timings from the correct transcoder (Ville). - Fix HDMI on BSW (Jani). Other fixes: - eDP fixes (Manasi) - Silence compiler warnings (Chris) - Order two completing nop_submit_request (Chris)