prj.conf: import OpenThread config from gateway blueprint

integrating prj.conf from https://booting.oniroproject.org/distro/blueprints/gateway/openthread-node-zephyr



Signed-off-by: Francesco Pham <francesco.pham@huawei.com>
change ip addr


change ip addr


change ip addr


prj.conf copy some settings from zephyr sample


change ip addr


change ip


change ip addr


revert ipv6 addresses


revert


revert