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

Signed-off-by: NZhao Yakui <yakui.zhao@intel.com>
Signed-off-by: NEric Anholt <eric@anholt.net>

drivers/gpu/drm/i915/intel_dp.c

@@ -1237,7 +1237,7 @@ intel_dp_hot_plug(struct intel_output *intel_output)
  * If no child dev is parsed from VBT, it is assumed that the given
  * DP is present.
  */
-int dp_is_present_in_vbt(struct drm_device *dev, int dp_reg)
+static int dp_is_present_in_vbt(struct drm_device *dev, int dp_reg)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct child_device_config *p_child;

drivers/gpu/drm/i915/intel_hdmi.c

@@ -233,7 +233,7 @@ static const struct drm_encoder_funcs intel_hdmi_enc_funcs = {
  * 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;

drivers/gpu/drm/i915/intel_lvds.c

@@ -977,7 +977,7 @@ static void intel_find_lvds_downclock(struct drm_device *dev,
  * Note: The addin_offset should also be checked for LVDS panel.
  * Only when it is non-zero, it is assumed that it is present.
  */
-int lvds_is_present_in_vbt(struct drm_device *dev)
+static int lvds_is_present_in_vbt(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct child_device_config *p_child;

drivers/gpu/drm/i915/intel_tv.c

@@ -1706,7 +1706,7 @@ static const struct drm_encoder_funcs intel_tv_enc_funcs = {
  * If it is not present, return false.
  * If no child dev is parsed from VBT, it assumes that the TV is present.
  */
-int tv_is_present_in_vbt(struct drm_device *dev)
+static int tv_is_present_in_vbt(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct child_device_config *p_child;