Enable synch negotiation; code was there but not enabled since this driver was ported from NetBSD. Tested on hppa (720) and aviion (4600).
Enable synch negotiation; code was there but not enabled since this driver was
ported from NetBSD.
Tested on hppa (720) and aviion (4600).

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars