drm/i915: Remove update_sprite_watermarks.

Commit 791a32be ("drm/i915: Drop intel_update_sprite_watermarks")
removes the use of this variable, but forgot to remove it.
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1455108583-29227-5-git-send-email-maarten.lankhorst@linux.intel.com

drivers/gpu/drm/i915/intel_display.c

@@ -11788,7 +11788,6 @@ int intel_plane_atomic_calc_changes(struct drm_crtc_state *crtc_state,
 	struct intel_plane_state *old_plane_state =
 		to_intel_plane_state(plane->state);
 	int idx = intel_crtc->base.base.id, ret;
-	int i = drm_plane_index(plane);
 	bool mode_changed = needs_modeset(crtc_state);
 	bool was_crtc_enabled = crtc->state->active;
 	bool is_crtc_enabled = crtc_state->active;
@@ -11867,9 +11866,6 @@ int intel_plane_atomic_calc_changes(struct drm_crtc_state *crtc_state,
 		    needs_scaling(to_intel_plane_state(plane_state)) &&
 		    !needs_scaling(old_plane_state))
 			pipe_config->disable_lp_wm = true;
-		else if (turn_off && !mode_changed)
-			intel_crtc->atomic.update_sprite_watermarks |=
-				1 << i;
 
 		break;
 	}

drivers/gpu/drm/i915/intel_drv.h

@@ -549,7 +549,6 @@ struct intel_crtc_atomic_commit {
 	/* Sleepable operations to perform after commit */
 	unsigned fb_bits;
 	bool post_enable_primary;
-	unsigned update_sprite_watermarks;
 
 	/* Sleepable operations to perform before and after commit */
 	bool update_fbc;