usbdebug: Fix AMD cimx/sb700 cimx/sb800

These Kconfig entries were forgotten from the commit
that re-enabled usbdebug for these southbridges.

Change-Id: Ia17f1dd3340408da7c033c2c949404d2636bed44
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/3849
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marc.jones@se-eng.com>
2 files changed