KVM: arm64: GICv4.1: Allow non-trapping WFI when using direct vtimer interrupt

virt inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8K89F


CVE: NA

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It's beneficial to avoid trapping on WFI when the vcpu is using the
direct delivered vtimer interrupt.

Signed-off-by: Zenghui Yu <yuzenghui@huawei.com>
Signed-off-by: Kunkun Jiang <jiangkunkun@huawei.com>
Signed-off-by: Dongxu Sun <sundongxu3@huawei.com>