Merge branch kvm-arm64/fpsimd-doc into kvmarm-master/next

* kvm-arm64/fpsimd-doc:
  : .
  : FPSIMD documentation update, courtesy of Mark Brown
  : .
  arm64/fpsimd: Clarify the purpose of using last in fpsimd_save()
  KVM: arm64: Add some more comments in kvm_hyp_handle_fpsimd()
  KVM: arm64: Add comments for context flush and sync callbacks

Signed-off-by: Marc Zyngier <maz@kernel.org>