No need two write a dedicated 1:1 mapping function and link that
for all the targets except RTL931x. Combine everything into a generic
helper and reduce the configuration structure.
Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Link: https://github.com/openwrt/openwrt/pull/20078
Signed-off-by: Robert Marko <robimarko@gmail.com>