drm/i915: move edp low vswing config to vbt data

Move all data initialized from VBT under dev_priv->vbt. No functional
changes.

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1458834623-8734-3-git-send-email-jani.nikula@intel.com
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 50e4978..1e08385 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -360,7 +360,7 @@
 static const struct ddi_buf_trans *
 skl_get_buf_trans_edp(struct drm_i915_private *dev_priv, int *n_entries)
 {
-	if (dev_priv->edp_low_vswing) {
+	if (dev_priv->vbt.edp.low_vswing) {
 		if (IS_SKL_ULX(dev_priv) || IS_KBL_ULX(dev_priv)) {
 			*n_entries = ARRAY_SIZE(skl_y_ddi_translations_edp);
 			return skl_y_ddi_translations_edp;
@@ -1431,7 +1431,7 @@
 	u32 n_entries, i;
 	uint32_t val;
 
-	if (type == INTEL_OUTPUT_EDP && dev_priv->edp_low_vswing) {
+	if (type == INTEL_OUTPUT_EDP && dev_priv->vbt.edp.low_vswing) {
 		n_entries = ARRAY_SIZE(bxt_ddi_translations_edp);
 		ddi_translations = bxt_ddi_translations_edp;
 	} else if (type == INTEL_OUTPUT_DISPLAYPORT