drm/i915: Replace __drm_gem_object_unreference with __drm_gem_object_put

This patch unifies the naming of DRM functions for reference counting
of struct drm_gem_object. The resulting code is more aligned with the
rest of the Linux kernel interfaces.
Signed-off-by: NThomas Zimmermann <tdz@users.sourceforge.net>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20180618110154.30462-4-tdz@users.sourceforge.net

drivers/gpu/drm/i915/i915_gem_object.h

@@ -345,7 +345,7 @@ __attribute__((nonnull))
 static inline void
 i915_gem_object_put(struct drm_i915_gem_object *obj)
 {
-	__drm_gem_object_unreference(&obj->base);
+	__drm_gem_object_put(&obj->base);
 }
 
 __deprecated