Docs: Add deprecation message to SSDT-PNLFCFL
+// WARN: This file is deprecated and left for compatibility reasons.
+// Please switch to SSDT-PNLF table if possible.
+//
// Adding PNLF device for WhateverGreen.kext and others.
// This one is specific to CFL+
// Rename GFX0 to anything else if your IGPU name is different.
