drm/test: use kunit action wrapper macro in the gem shmem test suite

#define TEST_BYTE		0xae

/*

 * Wrappers to avoid an explicit type casting when passing action

 * functions to kunit_add_action().

 * Wrappers to avoid cast warnings when passing action functions

 * directly to kunit_add_action().

 */

static void kfree_wrapper(void *ptr)

{

	const void *obj = ptr;

	kfree(obj);

}

static void sg_free_table_wrapper(void *ptr)

{

	struct sg_table *sgt = ptr;

KUNIT_DEFINE_ACTION_WRAPPER(kfree_wrapper, kfree, const void *);

	sg_free_table(sgt);

}

static void drm_gem_shmem_free_wrapper(void *ptr)

{

	struct drm_gem_shmem_object *shmem = ptr;

KUNIT_DEFINE_ACTION_WRAPPER(sg_free_table_wrapper, sg_free_table,

			    struct sg_table *);

	drm_gem_shmem_free(shmem);

}

KUNIT_DEFINE_ACTION_WRAPPER(drm_gem_shmem_free_wrapper, drm_gem_shmem_free,

			    struct drm_gem_shmem_object *);

/*

 * Test creating a shmem GEM object backed by shmem buffer. The test