drivers: base: test: Make property entry API test modular

There is no reason why the KUnit Tests for the property entry API can
only be built-in.  Add support for building these tests as a loadable
module, like is supported by most other tests.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/98388154383df9d4ced73946efd18318aeea50e2.1695820382.git.geert+renesas@glider.beSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/base/test/Kconfig

@@ -14,6 +14,6 @@ config DM_KUNIT_TEST
 	depends on KUNIT
 
 config DRIVER_PE_KUNIT_TEST
-	bool "KUnit Tests for property entry API" if !KUNIT_ALL_TESTS
-	depends on KUNIT=y
+	tristate "KUnit Tests for property entry API" if !KUNIT_ALL_TESTS
+	depends on KUNIT
 	default KUNIT_ALL_TESTS

drivers/base/test/property-entry-test.c

@@ -506,3 +506,7 @@ static struct kunit_suite property_entry_test_suite = {
 };
 
 kunit_test_suite(property_entry_test_suite);
+
+MODULE_DESCRIPTION("Test module for the property entry API");
+MODULE_AUTHOR("Dmitry Torokhov <dtor@chromium.org>");
+MODULE_LICENSE("GPL");