staging: wfx: correct misspelled words

Correct misspelled words: retrieved and auxiliary.
Issue detected by checkpatch tool.

Signed-off-by: Jules Irenge <jbi.octave@gmail.com>
Link: https://lore.kernel.org/r/20191019140719.2542-5-jbi.octave@gmail.com


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