GENERIC comment in ttyN.
- Add the name of the device driver creating the device nodes above the
respectives blocks so it's easier for user to find the right entry to
shut up warnings from getty(8). Replace 'Requires device 'uart' be
enabled.' with just 'uart(4)' as the former referred to a sparc64
GENERIC back when uart(4) wasn't enabled by default, yet.
- Turn off the getty(8) on screen as screen is created by ofw_console(4)
which is no longer enabled in the sparc64 GENERIC (and also only is a
last resort) to shut up warnings from getty(8) with the current GENERIC.
9a472268c8