KVM: VMX: add missing exit reasons

In order to simplify adding exit reasons in the future,
the array of exit reason names is now also sorted by
exit reason code.

Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>