lib/cyw43-driver: Update driver to latest version v1.0.1.

Includes a fix for combined BT+WiFi when using SPI transport.
Signed-off-by: NDamien George <damien@micropython.org>

cyw43-driver @ 8ef38a6d

-Subproject commit 36144f94bee69ad5e7b46fef06ce0c2405bafee5
+Subproject commit 8ef38a6d32c54f850bff8f189bdca19ded33792a