KVM: arm64: vgic: fix a kernel-doc warning

Use the correct function name in a kernel-doc comment to prevent a
warning:

arch/arm64/kvm/vgic/vgic.c:217: warning: expecting prototype for kvm_vgic_target_oracle(). Prototype was for vgic_target_oracle() instead
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Oliver Upton <oliver.upton@linux.dev>
Cc: James Morse <james.morse@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Zenghui Yu <yuzenghui@huawei.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: kvmarm@lists.linux.dev
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>
Link: https://lore.kernel.org/r/20240117230714.31025-11-rdunlap@infradead.orgSigned-off-by: Oliver Upton <oliver.upton@linux.dev>

arch/arm64/kvm/vgic/vgic.c

@@ -203,7 +203,7 @@ void vgic_irq_set_phys_active(struct vgic_irq *irq, bool active)
 }
 
 /**
- * kvm_vgic_target_oracle - compute the target vcpu for an irq
+ * vgic_target_oracle - compute the target vcpu for an irq
  *
  * @irq:	The irq to route. Must be already locked.
  *