All configuration helpers have been converted to look at the
control structure. Do the same for setup_polling(). With
this move the call location out of rtmdio_probe_one() into
the parent rtmdio_probe() where it belongs.
Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Link: https://github.com/openwrt/openwrt/pull/22830
Signed-off-by: Robert Marko <robimarko@gmail.com>