drm/i915: Returning the right VGA control reg for platforms

Signed-off-by: Sonika Jindal <sonika.jindal@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 9bc6267..30b23bf 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2803,10 +2803,10 @@
 
 static inline uint32_t i915_vgacntrl_reg(struct drm_device *dev)
 {
-	if (HAS_PCH_SPLIT(dev))
-		return CPU_VGACNTRL;
-	else if (IS_VALLEYVIEW(dev))
+	if (IS_VALLEYVIEW(dev))
 		return VLV_VGACNTRL;
+	else if (INTEL_INFO(dev)->gen >= 5)
+		return CPU_VGACNTRL;
 	else
 		return VGACNTRL;
 }