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/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 4b5cffa..2fd53bc 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -7024,7 +7024,7 @@
 	spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 }
 
-void __hsw_do_enable_pc8(struct drm_i915_private *dev_priv)
+void hsw_enable_pc8(struct drm_i915_private *dev_priv)
 {
 	struct drm_device *dev = dev_priv->dev;
 	uint32_t val;
@@ -7044,7 +7044,7 @@
 	hsw_disable_lcpll(dev_priv, true, true);
 }
 
-void __hsw_do_disable_pc8(struct drm_i915_private *dev_priv)
+void hsw_disable_pc8(struct drm_i915_private *dev_priv)
 {
 	struct drm_device *dev = dev_priv->dev;
 	uint32_t val;