drm/i915: rename __hsw_do_{en, dis}able_pc8

After we removed all the intermediate abstractions, we can rename
these functions to just hsw_{en,dis}able_pc8.

v2: - Rebase.

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@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 9aa01bfc..fa5d0ed 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -845,7 +845,7 @@
 	DRM_DEBUG_KMS("Suspending device\n");
 
 	if (HAS_PC8(dev))
-		__hsw_do_enable_pc8(dev_priv);
+		hsw_enable_pc8(dev_priv);
 
 	i915_gem_release_all_mmaps(dev_priv);
 
@@ -879,7 +879,7 @@
 	dev_priv->pm.suspended = false;
 
 	if (HAS_PC8(dev))
-		__hsw_do_disable_pc8(dev_priv);
+		hsw_disable_pc8(dev_priv);
 
 	DRM_DEBUG_KMS("Device resumed\n");
 	return 0;