CVE-2025-40354 drm/amd/display: increase max link count and fix link->enc NULL pointer access

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: increase max link count and fix link-enc NULL pointer access why 1. dc-linksMAXLINKS array size smaller than actual requested. maxconnector + maxdpia + 4 virtual = 14. increase from 12 to 14. 2. hwinit access nul...