wifi: mac80211: take wiphy lock for MAC addr change

[ Upstream commit a26787aa ]

We want to ensure everything holds the wiphy lock,
so also extend that to the MAC change callback.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Stable-dep-of: 74a7c93f ("wifi: mac80211: fix change_address deadlock during unregister")
Signed-off-by: Sasha Levin <sashal@kernel.org>