Request to backport "irqchip/gic-v3-its: Fix VSYNC referencing an unmapped VPE on GIC v4.1"

Hi Greg, Sasha,

Could you please help to backport the upstream commit 80e9963fb3b5509dfcabe9652d56bf4b35542055 ("irqchip/gic-v3-its: Fix VSYNC referencing an unmapped VPE on GIC v4.1") to

* 5.10 * 5.15 * 6.1 * 6.6

trees? It can be applied and built (with arm64's defconfig) cleanly on top of the mentioned stable branches.

Thanks, Zenghui