LoongArch: BPF: Support up to 12 function arguments for trampoline

LoongArch: BPF: Support up to 12 function arguments for trampoline

Currently, LoongArch bpf trampoline supports up to 8 function arguments.
According to the statistics from commit 473e3150e30a ("bpf, x86: allow
function arguments up to 12 for TRACING"), there are over 200 functions
accept 9 to 12 arguments, so add 12 arguments support for trampoline.

With this patch, the following related testcases passed:

  sudo ./test_progs -a tracing_struct/struct_many_args
  sudo ./test_progs -a fentry_test/fentry_many_args
  sudo ./test_progs -a fexit_test/fexit_many_args

Acked-by: Hengqi Chen <hengqi.chen@gmail.com>
Tested-by: Hengqi Chen <hengqi.chen@gmail.com>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>