staging: wfx: handle firmware events synchronously

Currently, events from firmware are handled in a work queue with a
complex event queue mechanism. It is probably overkill since there is
only two events to handle: bss_loss and CQM events. Handling these
events synchronously is sufficient.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20200420160311.57323-5-Jerome.Pouiller@silabs.com


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