kernel: Reorder kernel configuration options

kernel: Reorder kernel configuration options

Reorder the options and remove double entries.
This was generated by running this:
$ ./scripts/kconfig.pl '+' target/linux/generic/config-5.10 /dev/null > target/linux/generic/config-5.10.new
$ mv target/linux/generic/config-5.10.new target/linux/generic/config-5.10
$ ./scripts/kconfig.pl '+' target/linux/generic/config-5.4 /dev/null > target/linux/generic/config-5.4.new
$ mv target/linux/generic/config-5.4.new target/linux/generic/config-5.4

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