CVE-2025-38091 drm/amd/display: check stream id dml21 wrapper to get plane_id

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: check stream id dml21 wrapper to get planeid Why & How Fix a false positive warning which occurs due to lack of correct checks when querying planeid in DML21. This fixes the warning when performing a mode1 reset...