staging: wfx: keep API error list up-to-date

A new kind of error has appeared in API 3.4.

The Linux driver is not concerned by this new error, but let's keep the
API in sync with the firmware.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20200907101521.66082-5-Jerome.Pouiller@silabs.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>