drm/i915: Drop overlay DPMS call from valleyview_crtc_enable

VLV doesn't have the old video overlay.
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: NRodrigo Vivi <rodrigo.vivi@gmail.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_display.c

@@ -3622,9 +3622,6 @@ static void valleyview_crtc_enable(struct drm_crtc *crtc)
 	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);