The help output suggests clean-docker should be used to remove the
docker coreboot containers and images. The Makefile actually supports
the docker-clean target.
Corrected the help output to reflect the actual Makefile target.
BUG=N/A
TEST=build
Change-Id: Ib24f8e1ecdf3bdc31b3f8b484ce7ca0c19b645ee
Signed-off-by: Wim Vervoorn <wvervoorn@eltan.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38649
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Frans Hendriks <fhendriks@eltan.com>
60510733ae