Adding ad[4-6]s* to default devices

[Matthew Dillon]

:Any thoughts?
:
:More systems are coming out with 2 controllers - a PATA and a SATA,
:and as a result there might be more users using ad4 and so on..
:
:I know there's the MAKEDEV.local hook, just thought I'd mention it since
:I keep having having to remember to MAKEDEV on some my systems after
:installing them. If OK I'll probably go ahead and make the change.
:
:Thanks,
:- Chris

    We should be creating them through ad7 already.  Check HEAD.  If it isn't
    doing it properly then we definitely want to adjust it.

					-Matt
					Matthew Dillon 
					<dillon at backplane.com>