selftests/bpf: Skip res_spin_lock_stress if no perf support

Probe PMU support before loading bpf_test_rqspinlock.ko,
otherwise the test fails with not obvious error without
proper perf event support:

    Failed to load bpf_test_rqspinlock.ko into the kernel: -2
    serial_test_res_spin_lock_stress:FAIL:load module AA
        unexpected error: -22 (errno 2)

Reported-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Maxim Khmelevskii <max@linux.ibm.com>
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Link: https://lore.kernel.org/bpf/20260708104729.1248234-2-max@linux.ibm.com
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>

0 files changed, 0 insertions, 0 deletions