Hook up all AMD SB600/SB700 boards to the EHCI Debug Port infrastructure.

Hook up all AMD SB600/SB700 boards to the EHCI Debug Port infrastructure.

Without a (currently) dummy set_debug_port() function the build fails,
this may or may not be fixed differently in the future.

Manually build-tested on all SB600/SB700 boards, and tested on hardware on
one SB600 board I own, works fine.

Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Stefan Reinauer <stepan@coresystems.de>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5833 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1