util/sconfig: Fix warnings

and re-generate _shipped files

Change-Id: I7a18824d64d3f6212e8566695376bf97e2196ee2
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: https://review.coreboot.org/14733
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins)
7 files changed