drm/msm: Make msm_gem_free_object() static

Misc small cleanup I noticed.  Not called from another object file since
commit 3c9edd9c ("drm/msm: Introduce GEM object funcs")
Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/489362/
Link: https://lore.kernel.org/r/20220613204910.2651747-1-robdclark@gmail.comSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

drivers/gpu/drm/msm/msm_gem.c

@@ -1004,7 +1004,7 @@ void msm_gem_describe_objects(struct list_head *list, struct seq_file *m)
 #endif
 
 /* don't call directly!  Use drm_gem_object_put() */
-void msm_gem_free_object(struct drm_gem_object *obj)
+static void msm_gem_free_object(struct drm_gem_object *obj)
 {
 	struct msm_gem_object *msm_obj = to_msm_bo(obj);
 	struct drm_device *dev = obj->dev;

drivers/gpu/drm/msm/msm_gem.h

@@ -175,7 +175,6 @@ void msm_gem_active_get(struct drm_gem_object *obj, struct msm_gpu *gpu);
 void msm_gem_active_put(struct drm_gem_object *obj);
 int msm_gem_cpu_prep(struct drm_gem_object *obj, uint32_t op, ktime_t *timeout);
 int msm_gem_cpu_fini(struct drm_gem_object *obj);
-void msm_gem_free_object(struct drm_gem_object *obj);
 int msm_gem_new_handle(struct drm_device *dev, struct drm_file *file,
 		uint32_t size, uint32_t flags, uint32_t *handle, char *name);
 struct drm_gem_object *msm_gem_new(struct drm_device *dev,