drm/tests: Use KUNIT_DEFINE_ACTION_WRAPPER()

In order to pass functions to kunit_add_action(), they need to be of the
kunit_action_t type. While casting the function pointer can work, it
will break control-flow integrity.

drm_kunit_helpers already defines wrappers, but we now have a macro
which does this automatically. Using this greatly reduces the
boilerplate needed.

Acked-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

drivers/gpu/drm/tests/drm_kunit_helpers.c

@@ -27,27 +27,15 @@ static struct platform_driver fake_platform_driver = {
 	},
 };
 
-static void kunit_action_platform_driver_unregister(void *ptr)
-{
-	struct platform_driver *drv = ptr;
-
-	platform_driver_unregister(drv);
-
-}
-
-static void kunit_action_platform_device_put(void *ptr)
-{
-	struct platform_device *pdev = ptr;
-
-	platform_device_put(pdev);
-}
-
-static void kunit_action_platform_device_del(void *ptr)
-{
-	struct platform_device *pdev = ptr;
-
-	platform_device_del(pdev);
-}
+KUNIT_DEFINE_ACTION_WRAPPER(kunit_action_platform_driver_unregister,
+			    platform_driver_unregister,
+			    struct platform_driver *);
+KUNIT_DEFINE_ACTION_WRAPPER(kunit_action_platform_device_put,
+			    platform_device_put,
+			    struct platform_device *);
+KUNIT_DEFINE_ACTION_WRAPPER(kunit_action_platform_device_del,
+			    platform_device_del,
+			    struct platform_device *);
 
 /**
  * drm_kunit_helper_alloc_device - Allocate a mock device for a KUnit test