lenovo/t530/romstage.c: add usb port description and missing oc config

OC2 at port 4 was missing. Verified with RCBA dump.

Change-Id: Ide5701d53aeee28619204c7ac408662626aa11e4
Signed-off-by: Nicolas Reinecke <nr@das-labor.org>
Reviewed-on: http://review.coreboot.org/8304
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Philipp Deppenwiese <zaolin@das-labor.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
1 file changed