mt76: test report for three pending power-save fixes (MT7603E/MT7662E)

[Cristian Papa <pcristian292@gmail.com>]

Hi Felix,

I backported these commits from your pending branch, unchanged, onto
mt76 be5ce7910521 (backports 7.2, Linux 6.18.44) for a TP-Link Archer
XR500v (MT7603E 2.4 GHz + MT7662E 5 GHz):

  56b110804361 wifi: mt76: mt76x02: serialise wcid drop mask updates
  05fc7fb18f09 wifi: mt76: mt76x02: clear the wcid drop mask for all powersave responses
  2b7be52496ac wifi: mt76: honour the more-data flag when releasing buffered frames

With a phone associated to the MT7662E AP, three screen-off/wake cycles
(60 s each, browsing after each wake) worked without reconnecting, and
there were no resets or kernel warnings. The same three cycles on the
MT7603E AP, with a 1 Hz ping from the AP to the phone running throughout
(about 8 minutes), gave 474/474 replies, no reassociation, no resets and
no kernel warnings.

This is only a functional smoke test: I did not capture PS-Poll/U-APSD
or check MoreData/EOSP over the air, and the image carries other local
changes, so it does not isolate each commit.

Is anything holding these back from master, or is there a specific test
that would help?

Thanks,
Cristian