drm/i915: Allow PCH platforms fall back to BIOS LVDS mode

With intel_encoder_current_mode() using the normal state readout code it
actually works on PCH platforms as well. So let's nuke the PCH check from
intel_lvds_init(). I suppose there aren't any machines that actually
need this, but at least we get to eliminate a few lines of code, and one
FIXME.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171009161951.22420-2-ville.syrjala@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>

drivers/gpu/drm/i915/intel_lvds.c

@@ -1111,11 +1111,6 @@ void intel_lvds_init(struct drm_i915_private *dev_priv)
 	 * on.  If so, assume that whatever is currently programmed is the
 	 * correct mode.
 	 */
-
-	/* Ironlake: FIXME if still fail, not try pipe mode now */
-	if (HAS_PCH_SPLIT(dev_priv))
-		goto failed;
-
 	fixed_mode = intel_encoder_current_mode(intel_encoder);
 	if (fixed_mode) {
 		DRM_DEBUG_KMS("using current (BIOS) mode: ");