net: fill in MODULE_DESCRIPTION()s under net/core

W=1 builds now warn if module is built without a MODULE_DESCRIPTION().
Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/dev_addr_lists_test.c

@@ -233,4 +233,5 @@ static struct kunit_suite dev_addr_test_suite = {
 };
 kunit_test_suite(dev_addr_test_suite);
 
+MODULE_DESCRIPTION("KUnit tests for struct netdev_hw_addr_list");
 MODULE_LICENSE("GPL");

net/core/selftests.c

@@ -405,5 +405,6 @@ void net_selftest_get_strings(u8 *data)
 }
 EXPORT_SYMBOL_GPL(net_selftest_get_strings);
 
+MODULE_DESCRIPTION("Common library for generic PHY ethtool selftests");
 MODULE_LICENSE("GPL v2");
 MODULE_AUTHOR("Oleksij Rempel <o.rempel@pengutronix.de>");