We have build errors due to missing dependency on OF. Add the dependency and do it the same way for all three Nuvotons while we are at it. Reported-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/20230913-novoton-kconfig-v1-1-1c2dff14c0d2@linaro.org