net: Remove CONFIG_KMOD from net/ (towards removing CONFIG_KMOD entirely)

Some code here depends on CONFIG_KMOD to not try to load
protocol modules or similar, replace by CONFIG_MODULES
where more than just request_module depends on CONFIG_KMOD
and and also use try_then_request_module in ebtables.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/phonet/af_phonet.c b/net/phonet/af_phonet.c
index 9e9c6fc..b9d97ef 100644
--- a/net/phonet/af_phonet.c
+++ b/net/phonet/af_phonet.c
@@ -67,11 +67,10 @@
 	}
 
 	pnp = phonet_proto_get(protocol);
-#ifdef CONFIG_KMOD
 	if (pnp == NULL &&
 	    request_module("net-pf-%d-proto-%d", PF_PHONET, protocol) == 0)
 		pnp = phonet_proto_get(protocol);
-#endif
+
 	if (pnp == NULL)
 		return -EPROTONOSUPPORT;
 	if (sock->type != pnp->sock_type) {