Merge tag 'kvm-x86-generic-6.4' of https://github.com/kvm-x86/linux into HEAD

Common KVM changes for 6.4:

 - Drop unnecessary casts from "void *" throughout kvm_main.c

 - Tweak the layout of "struct kvm_mmu_memory_cache" to shrink the struct
   size by 8 bytes on 64-bit kernels by utilizing a padding hole

 - Fix a documentation format goof that was introduced when the KVM docs
   were converted to ReST

 - Constify MIPS's internal callbacks (a leftover from the hardware enabling
   rework that landed in 6.3)