selftests/net: add MPTCP coverage for IP_LOCAL_PORT_RANGE

Since previous commit, MPTCP has support for IP_BIND_ADDRESS_NO_PORT and
IP_LOCAL_PORT_RANGE sockopts.

Add ip4_mptcp and ip6_mptcp fixture variants to ip_local_port_range
selftest to provide selftest coverage for these sockopts.
Acked-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Maxim Galaganov <max@internet.ru>
Signed-off-by: Matthieu Baerts <matttbe@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

tools/testing/selftests/net/ip_local_port_range.c

@@ -146,6 +146,12 @@ FIXTURE_VARIANT_ADD(ip_local_port_range, ip4_stcp) {
 	.so_protocol	= IPPROTO_SCTP,
 };
 
+FIXTURE_VARIANT_ADD(ip_local_port_range, ip4_mptcp) {
+	.so_domain	= AF_INET,
+	.so_type	= SOCK_STREAM,
+	.so_protocol	= IPPROTO_MPTCP,
+};
+
 FIXTURE_VARIANT_ADD(ip_local_port_range, ip6_tcp) {
 	.so_domain	= AF_INET6,
 	.so_type	= SOCK_STREAM,
@@ -164,6 +170,12 @@ FIXTURE_VARIANT_ADD(ip_local_port_range, ip6_stcp) {
 	.so_protocol	= IPPROTO_SCTP,
 };
 
+FIXTURE_VARIANT_ADD(ip_local_port_range, ip6_mptcp) {
+	.so_domain	= AF_INET6,
+	.so_type	= SOCK_STREAM,
+	.so_protocol	= IPPROTO_MPTCP,
+};
+
 TEST_F(ip_local_port_range, invalid_option_value)
 {
 	__u16 val16;