drm/dp: Don't rewrite link config when setting phy test pattern
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.15.75 by commit 88fd06740659c69ab69dd5eba76a41de6cb9d6cf. For more details please see the references link.