KVM: arm64: vgic: Get rid of the LPI linked-list

All readers of LPI configuration have been transitioned to use the LPI
xarray. Get rid of the linked-list altogether.

Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20240221054253.3848076-6-oliver.upton@linux.dev
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>

include/kvm/arm_vgic.h

@@ -117,7 +117,6 @@ struct irq_ops {
 
 struct vgic_irq {
 	raw_spinlock_t irq_lock;	/* Protects the content of the struct */
-	struct list_head lpi_list;	/* Used to link all LPIs together */
 	struct list_head ap_list;
 
 	struct kvm_vcpu *vcpu;		/* SGIs and PPIs: The VCPU
@@ -277,7 +276,6 @@ struct vgic_dist {
 	/* Protects the lpi_list and the count value below. */
 	raw_spinlock_t		lpi_list_lock;
 	struct xarray		lpi_xa;
-	struct list_head	lpi_list_head;
 	int			lpi_list_count;
 
 	/* LPI translation cache */