Upgrade uboot-kirkwood to upstream release 2017.09
Catch up with upstream and move configuration options from
simple defines to Kconfig, as otherwise dependencies would
not be resolved and code would not compile.
Tested-by: Alberto Bursi <alberto.bursi@outlook.it>
Signed-off-by: Paul Wassi <p.wassi@gmx.at>
67da6a7c5e