drm/i915: share forcewaking code between IVB and HSW

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Signed-off-by: Eugeni Dodonov <eugeni.dodonov@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 7506a72..0ef4472 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9312,7 +9312,7 @@
 		dev_priv->display.force_wake_put = __gen6_gt_force_wake_put;
 
 		/* IVB configs may use multi-threaded forcewake */
-		if (IS_IVYBRIDGE(dev)) {
+		if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) {
 			u32	ecobus;
 
 			/* A small trick here - if the bios hasn't configured MT forcewake,