staging: wfx: drop unnecessary filter configuration when disabling filter

Currently, when mac80211 want to disable beacon filtering, the driver
reset the filter table and disable the beacon filtering. Only the latter
action is required.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20200515083325.378539-16-Jerome.Pouiller@silabs.com


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