drm/i915: Drop overlay DPMS call from valleyview_crtc_enable

VLV doesn't have the old video overlay.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 1e3f317..62557ec 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3622,9 +3622,6 @@
 	intel_enable_plane(dev_priv, plane, pipe);
 	intel_crtc_update_cursor(crtc, true);
 
-	/* Give the overlay scaler a chance to enable if it's on this pipe */
-	intel_crtc_dpms_overlay(intel_crtc, true);
-
 	intel_update_fbc(dev);
 
 	mutex_unlock(&dev_priv->dpio_lock);