drm/omap: Replace drm_gem_object_{un/reference} with put,get functions

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: NTomi Valkeinen <tomi.valkeinen@ti.com>

drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c

@@ -168,7 +168,7 @@ struct drm_gem_object *omap_gem_prime_import(struct drm_device *dev,
 			 * Importing dmabuf exported from out own gem increases
 			 * refcount on gem itself instead of f_count of dmabuf.
 			 */
-			drm_gem_object_reference(obj);
+			drm_gem_object_get(obj);
 			return obj;
 		}
 	}