[PATCH bpf-next] selftests/bpf: Fix build of sockmap_ktls.c

[Alexei Starovoitov <ast@xxxxxxxxxx>]

The selftests fails to build with:
tools/testing/selftests/bpf/prog_tests/sockmap_ktls.c: In function ‘test_sockmap_ktls_disconnect_after_delete’:
tools/testing/selftests/bpf/prog_tests/sockmap_ktls.c:72:37: error: ‘TCP_ULP’ undeclared (first use in this function)
   72 |  err = setsockopt(cli, IPPROTO_TCP, TCP_ULP, "tls", strlen("tls"));
      |                                     ^~~~~~~

Similar to commit that fixes build of sockmap_basic.c on systems with old
/usr/include fix the build of sockmap_ktls.c

Fixes: d1ba1204f2ee ("selftests/bpf: Test unhashing kTLS socket after removing from map")
Signed-off-by: Alexei Starovoitov <ast@xxxxxxxxxx>
---
 tools/testing/selftests/bpf/prog_tests/sockmap_ktls.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/testing/selftests/bpf/prog_tests/sockmap_ktls.c b/tools/testing/selftests/bpf/prog_tests/sockmap_ktls.c
index 589b50c91b96..06b86addc181 100644
--- a/tools/testing/selftests/bpf/prog_tests/sockmap_ktls.c
+++ b/tools/testing/selftests/bpf/prog_tests/sockmap_ktls.c
@@ -7,6 +7,7 @@
 #include "test_progs.h"
 
 #define MAX_TEST_NAME 80
+#define TCP_ULP 31
 
 static int tcp_server(int family)
 {
-- 
2.23.0