selftests/bpf: Move ENOTSUPP from bpf_util.h

Moving the definition of ENOTSUPP into bpf_util.h to remove the
duplicated definitions in multiple files.

Signed-off-by: Hou Tao <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Alexei Starovoitov <[e-mail]>
Signed-off-by: Andrii Nakryiko <[e-mail]>

tools/testing/selftests/bpf/bpf_util.h

···
 #define sys_gettid() syscall(SYS_gettid)
 #endif
 
+#ifndef ENOTSUPP
+#define ENOTSUPP 524
+#endif
 
 #endif /* __BPF_UTIL__ */

tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c

···
 #include "tcp_ca_kfunc.skel.h"
 #include "bpf_cc_cubic.skel.h"
 
-#ifndef ENOTSUPP
-#define ENOTSUPP 524
-#endif
-
 static const unsigned int total_bytes = 10 * 1024 * 1024;
 static int expected_stg = 0xeB9F;
 

tools/testing/selftests/bpf/prog_tests/lsm_cgroup.c

···
 #include "cgroup_helpers.h"
 #include "network_helpers.h"
 
-#ifndef ENOTSUPP
-#define ENOTSUPP 524
-#endif
-
 static struct btf *btf;
 
 static __u32 query_prog_cnt(int cgroup_fd, const char *attach_func)

tools/testing/selftests/bpf/prog_tests/sock_addr.c

···
 #include "getpeername_unix_prog.skel.h"
 #include "network_helpers.h"
 
-#ifndef ENOTSUPP
-# define ENOTSUPP 524
-#endif
-
 #define TEST_NS                 "sock_addr"
 #define TEST_IF_PREFIX          "test_sock_addr"
 #define TEST_IPV4               "127.0.0.4"

tools/testing/selftests/bpf/test_maps.c

···
 #include "test_maps.h"
 #include "testing_helpers.h"
 
-#ifndef ENOTSUPP
-#define ENOTSUPP 524
-#endif
-
 int skips;
 
 static struct bpf_map_create_opts map_opts = { .sz = sizeof(map_opts) };

tools/testing/selftests/bpf/test_verifier.c

···
 #include "../../../include/linux/filter.h"
 #include "testing_helpers.h"
 
-#ifndef ENOTSUPP
-#define ENOTSUPP 524
-#endif
-
 #define MAX_INSNS	BPF_MAXINSNS
 #define MAX_EXPECTED_INSNS	32
 #define MAX_UNEXPECTED_INSNS	32