Re-write the end of 'nl80211_trigger_scan()' with a more standard, easy to
understand and future proof version.
Signed-off-by: NChristophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/20200712173551.274448-1-christophe.jaillet@wanadoo.frSigned-off-by: NJohannes Berg <johannes.berg@intel.com>