selftests: net: reuseport_bpf_numa: don't fail if no numa support

The reuseport_bpf_numa test case fails there's no numa support. The
test shouldn't fail if there's no support it should be skipped.

Fixes: 3c2c3c16aaf6 ("reuseport, bpf: add test case for bpf_get_numa_node_id")
Signed-off-by: Anders Roxell <[e-mail]>
Signed-off-by: Daniel Borkmann <[e-mail]>

tools/testing/selftests/net/reuseport_bpf_numa.c

···
 #include <unistd.h>
 #include <numa.h>
 
+#include "../kselftest.h"
+
 static const int PORT = 8888;
 
 static void build_rcv_group(int *rcv_fd, size_t len, int family, int proto)
···
 	int *rcv_fd, nodes;
 
 	if (numa_available() < 0)
-		error(1, errno, "no numa api support");
+		ksft_exit_skip("no numa api support\n");
 
 	nodes = numa_max_node() + 1;