Merge branch kvm-arm64/pkvm-fixed-features-prologue into kvmarm-master/next

Merge branch kvm-arm64/pkvm-fixed-features-prologue into kvmarm-master/next

* kvm-arm64/pkvm-fixed-features-prologue:
  : Rework a bunch of common infrastructure as a prologue
  : to Fuad Tabba's protected VM fixed feature series.
  KVM: arm64: Upgrade trace_kvm_arm_set_dreg32() to 64bit
  KVM: arm64: Add config register bit definitions
  KVM: arm64: Add feature register flag definitions
  KVM: arm64: Track value of cptr_el2 in struct kvm_vcpu_arch
  KVM: arm64: Keep mdcr_el2's value as set by __init_el2_debug
  KVM: arm64: Restore mdcr_el2 from vcpu
  KVM: arm64: Refactor sys_regs.h,c for nVHE reuse
  KVM: arm64: Fix names of config register fields
  KVM: arm64: MDCR_EL2 is a 64-bit register
  KVM: arm64: Remove trailing whitespace in comment
  KVM: arm64: placeholder to check if VM is protected

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