selftests/bpf: Fix test test_libbpf_str/bpf_map_type_str

selftests/bpf: Fix test test_libbpf_str/bpf_map_type_str

Previous bpf patch made a change to uapi bpf.h like
  @@ -922,7 +922,14 @@ enum bpf_map_type {
        BPF_MAP_TYPE_SOCKHASH,
  -     BPF_MAP_TYPE_CGROUP_STORAGE,
  +     BPF_MAP_TYPE_CGROUP_STORAGE_DEPRECATED,
  +     BPF_MAP_TYPE_CGROUP_STORAGE = BPF_MAP_TYPE_CGROUP_STORAGE_DEPRECATED,
        BPF_MAP_TYPE_REUSEPORT_SOCKARRAY,
where BPF_MAP_TYPE_CGROUP_STORAGE_DEPRECATED and BPF_MAP_TYPE_CGROUP_STORAGE
have the same enum value. This will cause selftest test_libbpf_str/bpf_map_type_str
failing. This patch fixed the issue by avoid the check for
BPF_MAP_TYPE_CGROUP_STORAGE_DEPRECATED in the test.

Signed-off-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/r/20221026042906.674830-1-yhs@fb.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>