KVM/arm64 updates for 7.2 * New features: - None. Zilch. Nada. Que dalle. * Fixes and other improvements: - Significant cleanup of the vgic-v5 PPI support which was merged in 7.1. This makes the code more maintainable, and squashes a couple of bugs in the meantime. - Set of fixes for the handling of the MMU in an NV context, particularly VNCR-triggered faults. S1POE support is fixed as well. - Large set of pKVM fixes, mostly addressing recurring issues around hypervisor tracking of donated pages in obscure cases where the donation could fail and leave things in a bizarre state. - Fixes for the so-called "lazy vgic init", which resulted in sleeping operations in non-preemptible sections. This turned out to be far more invasive than initially expected... - Reduce the overhead of L1/L2 context switch by not touching the FP registers. - Fix the way non-implemented page sizes are dealt with when a guest insist on using them for S2 translation. - The usual set of low-impact fixes and cleanups all over the map.