riscv: hwprobe: export Zaamo and Zalrsc extensions

Export the Zaamo and Zalrsc extensions to userspace using hwprobe.

Signed-off-by: Clément Léger <cleger@rivosinc.com>
Reviewed-by: Charlie Jenkins <charlie@rivosinc.com>
Link: https://lore.kernel.org/r/20240619153913.867263-4-cleger@rivosinc.com


Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>