wifi: rtw88: iterate over vif/sta list non-atomically

The driver uses ieee80211_iterate_active_interfaces_atomic()
and ieee80211_iterate_stations_atomic() in several places and does
register accesses in the iterators. This doesn't cope with upcoming
USB support as registers can only be accessed non-atomically.

Split these into a two stage process: First use the atomic iterator
functions to collect all active interfaces or stations on a list, then
iterate over the list non-atomically and call the iterator on each
entry.

Signed-off-by: Sascha Hauer <[email protected]>
Suggested-by: Ping-Ke shih <[email protected]>
Reviewed-by: Ping-Ke Shih <[email protected]>
Signed-off-by: Kalle Valo <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

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