drm/i915: fix sparse warnings: make symbols static

Signed-off-by: Hannes Eder <hannes@hanneseder.net>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@linux.ie>
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 5689e44..579dc42 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -343,7 +343,7 @@
 	udelay(20000);
 }
 
-void
+static void
 intel_pipe_set_base(struct drm_crtc *crtc, int x, int y)
 {
 	struct drm_device *dev = crtc->dev;
@@ -1329,7 +1329,7 @@
 };
 
 
-void intel_crtc_init(struct drm_device *dev, int pipe)
+static void intel_crtc_init(struct drm_device *dev, int pipe)
 {
 	struct intel_crtc *intel_crtc;
 	int i;
@@ -1375,7 +1375,7 @@
 	return crtc;
 }
 
-int intel_connector_clones(struct drm_device *dev, int type_mask)
+static int intel_connector_clones(struct drm_device *dev, int type_mask)
 {
 	int index_mask = 0;
 	struct drm_connector *connector;