drm/i915: Declare the new VBT parsing functions as static

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 2ff5d03..7c5c6af 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -233,7 +233,7 @@
  * If no child dev is parsed from VBT, it assumes that the given
  * HDMI is present.
  */
-int hdmi_is_present_in_vbt(struct drm_device *dev, int hdmi_reg)
+static int hdmi_is_present_in_vbt(struct drm_device *dev, int hdmi_reg)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct child_device_config *p_child;