KVM: VMX: avoid guest hang on invalid invvpid instruction

A guest executing an invalid invvpid instruction would hang
because the instruction pointer was not updated.

Reported-by:  <jmontleo@redhat.com>
Tested-by:  <jmontleo@redhat.com>
Cc: stable@vger.kernel.org
Fixes: 99b83ac8
Reviewed-by: David Matlack <dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>