staging: wfx: Typo fix

Fixing some typo errors in traces.h file

Signed-off-by: Mohamed Dawod <mhm.dawod@gmail.com>
Link: https://lore.kernel.org/r/20200518062445.GA13044@dinux


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