Add Synergy21 S21810 support; from NetBSD. Remove flags, it's not used.
Add Synergy21 S21810 support; from NetBSD.
Remove flags, it's not used.

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