kernel: Reorder configuration

This reorders the generic kernel configuration files.
This was done with the following commands:
$ ./scripts/kconfig.pl '+' target/linux/generic/config-4.14 /dev/null > target/linux/generic/config-4.14-new
$ mv target/linux/generic/config-4.14-new target/linux/generic/config-4.14
$ ./scripts/kconfig.pl '+' target/linux/generic/config-4.9 /dev/null > target/linux/generic/config-4.9-new
$ mv target/linux/generic/config-4.9-new target/linux/generic/config-4.9

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>