drm/i915/bxt: Don't uninit/init display core twice during system suspend/resume

Atm, we run the BSpec display core uninit/init sequences twice during
system suspend/resume. While this shouldn't cause any problem, it's
redundant, so get rid of the duplicate call.
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Bob Paauwe <bob.j.paauwe@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1461173277-16090-3-git-send-email-imre.deak@intel.com

drivers/gpu/drm/i915/i915_drv.c

@@ -668,10 +668,9 @@ static int i915_drm_suspend_late(struct drm_device *drm_dev, bool hibernation)
 		intel_power_domains_suspend(dev_priv);
 
 	ret = 0;
-	if (IS_BROXTON(dev_priv)) {
-		bxt_display_core_uninit(dev_priv);
+	if (IS_BROXTON(dev_priv))
 		bxt_enable_dc9(dev_priv);
-	} else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
+	else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
 		hsw_enable_pc8(dev_priv);
 	else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
 		ret = vlv_suspend_complete(dev_priv);
@@ -868,10 +867,9 @@ static int i915_drm_resume_early(struct drm_device *dev)
 
 	intel_uncore_early_sanitize(dev, true);
 
-	if (IS_BROXTON(dev)) {
+	if (IS_BROXTON(dev))
 		bxt_disable_dc9(dev_priv);
-		bxt_display_core_init(dev_priv, true);
-	} else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
+	else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
 		hsw_disable_pc8(dev_priv);
 
 	intel_uncore_sanitize(dev);