KVM: arm/arm64: vgic: Relax vgic_can_sample_irq for edge IRQs

We only set the irq_queued flag for level interrupts, meaning
that "!vgic_irq_is_queued(vcpu, irq)" is a good enough predicate
for all interrupts.

This will allow us to inject edge HW interrupts, for which the
state ACTIVE+PENDING is not allowed.
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

virt/kvm/arm/vgic.c

@@ -375,7 +375,7 @@ void vgic_cpu_irq_clear(struct kvm_vcpu *vcpu, int irq)
 
 static bool vgic_can_sample_irq(struct kvm_vcpu *vcpu, int irq)
 {
-	return vgic_irq_is_edge(vcpu, irq) || !vgic_irq_is_queued(vcpu, irq);
+	return !vgic_irq_is_queued(vcpu, irq);
 }
 
 /**