People using Kernel 4.14.y from kernel.org should be aware there is a bug that misconifgures the MMC3 devices, so the WiFi driver doesn't communicate properly.

A fix was later introduced, and a request has been made to back-port this driver.

In the meantime, users of 4.14 through 4.14.14 should use the patch located:

https://patchwork.kernel.org/patch/10032239/

adam