CVE-2024-56711 drm/panel: himax-hx83102: Add a check to prevent NULL pointer dereference

In the Linux kernel, the following vulnerability has been resolved: drm/panel: himax-hx83102: Add a check to prevent NULL pointer dereference drmmodeduplicate could return NULL due to lack of memory, which will then call NULL pointer dereference. Add a check to prevent it...