KVM: SVM: Rename hook implementations to conform to kvm_x86_ops' names

Massage SVM's implementation names that still diverge from kvm_x86_ops to
allow for wiring up all SVM-defined functions via kvm-x86-ops.h.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220128005208.4008533-22-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>