This removes the previous WiFi driver from drivers/cyw43 (but leaves behind
the BT driver), and makes the stm32 port (i.e. PYBD and Portenta) use the
new "lib/cyw43-driver" open-source driver already in use by the rp2 port.
Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
Commit 4dba04a50fea01f6f8fec83d64f958f8d14e285a refactored the network code
but the combination of MICROPY_PY_WIZNET5K=5500 and MICROPY_PY_LWIP=1
broke.
