The "reset" key on a few IXP4xx routers were sending KEY_ESC
but what we want to send is KEY_RESTART which will make
OpenWrt and similar userspace do a controlled reboot.
Link: https://lore.kernel.org/r/20230908-ixp4xx-dts-v1-2-98d36264ed6d@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>