[PATCH 0/2] Add quirk to disable PSR 2 on Tongfang PHxTxX1 and PHxTQx1

[Werner Sembach]

On these Barebones PSR 2 is recognized as supported but is very buggy:
- Upper third of screen does sometimes not updated, resulting in
disappearing cursors or ghosts of already closed Windows saying behind.
- Approximately 40 px from the bottom edge a 3 pixel wide strip of randomly
colored pixels is flickering.

PSR 1 is working fine however.

This patchset introduces a new quirk to disable PSR 2 specifically on known
buggy devices and applies it to the Tongfang PHxTxX1 and PHxTQx1 barebones.

Signed-off-by: Werner Sembach <wse@xxxxxxxxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>