The declarations in usb_debug.c needs to be guarded in order to not
conflict with other chipsets.
Change-Id: I84c3401b9419f2878c2cfdf81147fa854018f9ae
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36878
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Mike Banon <mikebdp2@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>