drm/i915: add BDW runtime PM support

This sould be enough.

v2: BDW should also run hsw_runtime_resume (Ben).

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 4b6c99d..a01faea 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -875,8 +875,10 @@
 
 	if (IS_GEN6(dev))
 		snb_runtime_suspend(dev_priv);
-	else if (IS_HASWELL(dev))
+	else if (IS_HASWELL(dev) || IS_BROADWELL(dev))
 		hsw_runtime_suspend(dev_priv);
+	else
+		WARN_ON(1);
 
 	i915_gem_release_all_mmaps(dev_priv);
 
@@ -911,8 +913,10 @@
 
 	if (IS_GEN6(dev))
 		snb_runtime_resume(dev_priv);
-	else if (IS_HASWELL(dev))
+	else if (IS_HASWELL(dev) || IS_BROADWELL(dev))
 		hsw_runtime_resume(dev_priv);
+	else
+		WARN_ON(1);
 
 	DRM_DEBUG_KMS("Device resumed\n");
 	return 0;