drm/i915: Update cacheline_align() to take a request structure

Updated intel_ring_cacheline_align() to take a request instead of a ring.

For: VIZ-5115
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Tomas Elf <tomas.elf@intel.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 7ec2421..7882820 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -11055,7 +11055,7 @@
 	 * then do the cacheline alignment, and finally emit the
 	 * MI_DISPLAY_FLIP.
 	 */
-	ret = intel_ring_cacheline_align(ring);
+	ret = intel_ring_cacheline_align(req);
 	if (ret)
 		return ret;