Hi,
The above mentioned AMD OpenCL™ 2.0 Driver is quite old and an experimental version only. Please don't use that driver.
Currently, on Linux, OpenCL is supported via these two Linux driver stacks: AMDGPU-PRO and ROCm.
After searching for compatible drivers for those products, however, I find below drivers only for Windows.
7th Gen A12 9800 APU: Support page | AMD
AMD Ryzen™ 5 2400G with Radeon™ RX Vega 11 Graphics: Support page | AMD
Regarding the driver support, I would suggest you to check with our support team here Drivers & Software for more information.
Regards,