Drop leftovers from refactoring. Additionally convert all references
to the old dynamically calculated rings/ringsizes to the new ones.
Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Link: https://github.com/openwrt/openwrt/pull/21856
Signed-off-by: Robert Marko <robimarko@gmail.com>