soc/amd/piasso,cezanne: add warning about using all-y in Makefile.inc

all-y will also add a compilation unit to the verstage on PSP build that
runs on an ARM code instead of a x86 one. At the moment Cezanne doesn't
have verstage on PSP support yet, but since it'll eventually land it
doesn't hurt to already add the comment now.

Change-Id: I15fb66e796cab48737ba5ac463c4c973794a005a
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48521
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>

0 files changed, 0 insertions, 0 deletions