perf, riscv: Wire up perf trace support for RISC-V

RISC-V does not currently support perf trace, since the system call
table is not generated.

Perform the copy/paste exercise, wiring up RISC-V system call table
generation.

Signed-off-by: Björn Töpel <bjorn@rivosinc.com>
Tested-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Cc: Anup Patel <anup@brainfault.org>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: linux-riscv@lists.infradead.org
Cc: Atish Patra <atishp@rivosinc.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Link: https://lore.kernel.org/r/20241024190353.46737-1-bjorn@kernel.org


Signed-off-by: Namhyung Kim <namhyung@kernel.org>