wil6210: remove erroneous wiphy locking

We already hold the wiphy lock in all cases when we get
here, so this would deadlock, remove the erroneous locking.

Fixes: a05829a7 ("cfg80211: avoid holding the RTNL when calling the driver")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210426212929.83f1de07c2cd.I630a2a00eff185ba0452324b3d3f645e01128a95@changeid