KVM: x86: Print CPU of last attempted VM-entry when dumping VMCS/VMCB

Failed VM-entry is often due to a faulty core. To help identify bad
cores, print the id of the last logical processor that attempted
VM-entry whenever dumping a VMCS or VMCB.

Signed-off-by: Jim Mattson <jmattson@google.com>
Message-Id: <20210621221648.1833148-1-jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>