selftests: bpf: skip FOU tests in test_tc_tunnel

JIRA: https://issues.redhat.com/browse/RHEL-101819
Upstream status: RHEL only. Forward ported from RHEL 9.

We do not have FOU enabled. Skip tests using it in test_tc_tunnel.sh.

Signed-off-by: Felix Maurer <fmaurer@redhat.com>

Author: fmaurer-rh

tools/testing/selftests/bpf/test_tc_tunnel.sh

@@ -195,6 +195,12 @@ readonly datalen=$4
 
 echo "encap ${addr1} to ${addr2}, type ${tuntype}, mac ${mac} len ${datalen}"
 
+if [[ "$tuntype" =~ "udp" ]]; then
+	# We do not have FOU enabled, skip the FOU tests
+	echo SKIP
+	exit 0
+fi
+
 trap cleanup EXIT
 
 setup