drivers: base: test: Add missing MODULE_* macros to root device tests

Commit 06188bc80ccb ("drivers: base: Add basic devm tests for root
devices") introduced a new set of tests for root devices that could be
compiled as a module, but didn't have the usual module macros.

Make sure they're there.

Fixes: 06188bc80ccb ("drivers: base: Add basic devm tests for root devices")
Reported-by: Stephen Rothwell <[e-mail]>
Signed-off-by: Maxime Ripard <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/base/test/root-device-test.c

···
 };
 
 kunit_test_suite(root_device_devm_test_suite);
+
+MODULE_DESCRIPTION("Test module for root devices");
+MODULE_AUTHOR("Maxime Ripard <[e-mail]>");
+MODULE_LICENSE("GPL");