RISC-V: KVM: Allow Zaamo/Zalrsc extensions for Guest/VM

Extend the KVM ISA extension ONE_REG interface to allow KVM user space
to detect and enable Zaamo/Zalrsc extensions for Guest/VM.

Signed-off-by: Clément Léger <cleger@rivosinc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20240619153913.867263-5-cleger@rivosinc.com


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