KVM: arm64: GICv4.1: Inform the HiSilicon vtimer irqbypass capability

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


CVE: NA

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HiSilicon implementation of GICv4.1 has provided direct injection capability
of vtimer interrupts.  Inform users about the capability by vgic_global's
has_direct_vtimer, which depends on the HW-capability from gic_kvm_info and
kernel command "kvm-arm.vgic_v4_enable=1".

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