target/riscv: Support setting external interrupt by KVM

target/riscv: Support setting external interrupt by KVM

When KVM is enabled, set the S-mode external interrupt through
kvm_riscv_set_irq function.

Signed-off-by: Yifei Jiang <[email protected]>
Signed-off-by: Mingwang Li <[email protected]>
Reviewed-by: Alistair Francis <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
Message-id: 20220112081329[email protected]
Signed-off-by: Alistair Francis <[email protected]>