drm: Add missing static storage class specifier

Fixes the following sparse warning:
drivers/gpu/drm/drm_info.c:238:5:
warning: symbol 'drm_gem_one_name_info' was not declared. Should it be static?

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/drm_info.c b/drivers/gpu/drm/drm_info.c
index ab1162d..4076a33 100644
--- a/drivers/gpu/drm/drm_info.c
+++ b/drivers/gpu/drm/drm_info.c
@@ -235,7 +235,7 @@
 }
 
 
-int drm_gem_one_name_info(int id, void *ptr, void *data)
+static int drm_gem_one_name_info(int id, void *ptr, void *data)
 {
 	struct drm_gem_object *obj = ptr;
 	struct seq_file *m = data;