cmd: move CMD_DHCP6 options beneath CMD_DHCP6

All Kconfig options that depend on CONFIG_CMD_DHCP6 should immediately
follow it.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
1 file changed