CVE-2024-39498

In the Linux kernel, the following vulnerability has been resolved:
drm/mst: Fix NULL pointer dereference at drm_dp_add_payload_part2
[Why]
Commit:

• commit 5aa1dfcdf0a4 (“drm/mst: Refactor the flow for payload
  allocation/removement”)
  accidently overwrite the commit
• commit 54d217406afe (“drm: use mgr->dev in drm_dbg_kms in
  drm_dp_add_payload_part2”)
  which cause regression.
  [How]
  Recover the original NULL fix and remove the unnecessary input parameter
  ‘state’ for
  drm_dp_add_payload_part2().
  (cherry picked from commit 4545614c1d8da603e57b60dd66224d81b6ffc305)