drm/i915: Parse the eDP link configuration from the vBIOS

First step, lets have a look at the values for troublesome panels and
see if they may be used to improve our link training.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

drivers/gpu/drm/i915/intel_lvds.c

@@ -864,7 +864,7 @@ void intel_lvds_init(struct drm_device *dev)
 	if (HAS_PCH_SPLIT(dev)) {
 		if ((I915_READ(PCH_LVDS) & LVDS_DETECTED) == 0)
 			return;
-		if (dev_priv->edp_support) {
+		if (dev_priv->edp.support) {
 			DRM_DEBUG_KMS("disable LVDS for eDP support\n");
 			return;
 		}