KVM: riscv: selftests: Add Zawrs extension to get-reg-list test

KVM RISC-V allows the Zawrs extension for the Guest/VM, so add it
to the get-reg-list test.

Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Acked-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20240426100820.14762-14-ajones@ventanamicro.com


Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>