selftests/bpf: Test jited inline of bpf_get_smp_processor_id() for LoongArch

selftests/bpf: Test jited inline of bpf_get_smp_processor_id() for LoongArch

Add the testcase for the jited inline of bpf_get_smp_processor_id(),
only for LoongArch currently.

Here is the test result on LoongArch:

  $ sudo ./test_progs -t verifier_jit_inline
  #604/1   verifier_jit_inline/inline_bpf_get_current_task:OK
  #604/2   verifier_jit_inline/inline_bpf_get_smp_processor_id:OK
  #604     verifier_jit_inline:OK
  Summary: 1/2 PASSED, 0 SKIPPED, 0 FAILED

Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>