Warn only once since the ratelimit parameters are still
allowing too many messages to happen. This will no longer
tell you all the different processes, but still gives a
heads-up of sorts.

Also modify the message to note that wext stops working
for future Wi-Fi 7 hardware, this is already implemented
in commit 4ca69027 ("wifi: wireless: deny wireless
extensions on MLO-capable devices") and is maybe of more
relevance to users than the fact that we'd like to have
wireless extensions deprecated.

The issue with Wi-Fi 7 is that you can now have multiple
connections to the same AP, so a whole bunch of things
now become per link rather than per netdev, which can't
really be handled in wireless extensions.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230224135933.94104aeda1a0.Ie771c6a66d7d6c3cf67da5f3b0c66cea66fd514c@changeid