This change gets rid of unused 3rd parameter chips to the function
walk_device_tree.
BUG=b:80081934
TEST=Verified that abuild compiles successfully for all boards.
Change-Id: I255ff030562073b16310fc22a0981808bf2c062f
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/26801
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>