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_dvo.c b/drivers/gpu/drm/i915/intel_dvo.c
index 008bfaed..cc621c8 100644
--- a/drivers/gpu/drm/i915/intel_dvo.c
+++ b/drivers/gpu/drm/i915/intel_dvo.c
@@ -43,7 +43,7 @@
 extern struct intel_dvo_dev_ops tfp410_ops;
 extern struct intel_dvo_dev_ops ch7017_ops;
 
-struct intel_dvo_device intel_dvo_devices[] = {
+static struct intel_dvo_device intel_dvo_devices[] = {
 	{
 		.type = INTEL_DVO_CHIP_TMDS,
 		.name = "sil164",
@@ -335,7 +335,7 @@
 	.best_encoder = intel_best_encoder,
 };
 
-void intel_dvo_enc_destroy(struct drm_encoder *encoder)
+static void intel_dvo_enc_destroy(struct drm_encoder *encoder)
 {
 	drm_encoder_cleanup(encoder);
 }