Fix behaviour of keyboard under pc98 where keycodes differ from i386. [1]
Fix behaviour of keyboard under sparc64, where keycodes were off by one
(i.e., when pressing 'd' on keyboard, server would get code for 'f'). [2]

PR: ports/71937 [1]
Submitted by: Satoshi Kimura [1], marius [2]
Approved by: portmgr (linimon), mentor (anholt)