This is the answer that one of the main Moderator's of AMD Forum gave to another poster concerning the same issue that you are having.
Re: AMD Radeon Software detects an update for my gpu but after updating I get installed a different hardware
Graphics cards in laptop computers are customized by the manufacturer to meet their specific design requirements,.
AMD provided reference drivers for laptop products that use a generic Device ID. This has no impact on performance,
If you want the GPU to appears exactly as specified by the manufacturer, you will need to use drivers provided by the laptop manufacturer.