staging: wfx: hif_scan() never fails

If scan fails, status is returned in hif_ind_scan_cmpl. hif_scan
always return a success. So, we can simplify the code.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20191217161318.31402-45-Jerome.Pouiller@silabs.com


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