PERFORCE change 88522 for review

[M. Warner Losh]

In message: <200512211525.jBLFPJcl015651 at repoman.freebsd.org>
            Olivier Houchard <cognet at freebsd.org> writes:
: 	Add a new option to use the USART0 as the console instead of DBGU,
: 	USART0_CONSOLE, and use it for Skyeye.
: 	This is enough to get Skyeye to boot a FreeBSD kernel again.

I'd planned on making this settable via a hint...

Does skyeye have a network emulator?

Does this mean that the usart driver is working well enough to get us
to the exec of /bin/sh?

Warner