wifi: mac80211: add support to accumulate removed link statistics

wifi: mac80211: add support to accumulate removed link statistics

Currently, if a link gets removed in between for a station then
directly accumulated data will fall down to sum of other active links.
This will bring inconsistency in station dump statistics.

For instance, let's take Tx packets
- at t=0-> link-0:2 link-1:3 Tx packets => accumulated = 5
- at t=1-> link-0:4 link-1:6 Tx packets => accumulated = 10
let say at t=2, link-0 went down => link-0:0 link-1:7 => accumulated = 7
Here, suddenly accumulated Tx packets will come down to 7 from 10.
This is showing inconsistency.

Therefore, store link-0 data when it went down and add to accumulated
Tx packet = 11.

Hence, store the removed link statistics data in sta structure and
add it in accumulated statistics for consistency.

Signed-off-by: Sarika Sharma <quic_sarishar@quicinc.com>
Link: https://patch.msgid.link/20250528054420.3050133-7-quic_sarishar@quicinc.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>