wifi: mac80211: fix the comeback long retry times

When we had a comeback, we will never use the default timeout values
again because comeback is never cleared.
Clear comeback if we send another association request which will allow
to start a default timer after Tx status.

The problem was seen with iwlwifi where the tx_status on the association
request is handled before the association response frame (which is the
usual case).

1) Tx assoc request 1/3
2) Rx assoc response (comeback, timeout = 1 second)
3) wait 1 second
4) Tx assoc request 2/3
5) Set timer to IEEE80211_ASSOC_TIMEOUT_LONG = 500ms (1 second after
   round_up)
6) tx_status on frame sent in 4) is ignored because comeback is still
   true
7) AP does not reply with assoc response
8) wait 1s <= This is where the bug is felt
9) Tx assoc request 3/3

With this fix, in step 6 we will reset the timer to
IEEE80211_ASSOC_TIMEOUT_SHORT = 100ms and we will wait only 100ms in
step 8.

Fixes: b133fdf07db8 ("wifi: mac80211: Skip association timeout update after comeback rejection")
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Link: https://patch.msgid.link/20240808085916.23519-1-emmanuel.grumbach@intel.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

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