PMF EC notifications

Hi,

The following two patches fix the notification path to the EC (by way of SBIOS) for the PMF driver.

33c9ab5b493a0 platform/x86/amd/pmf: Notify OS power slider update 839e90e75e695 platform/x86/amd/pmf: reduce verbosity of apmf_get_system_params

This change allows Phoenix based laptops to use software like power-profiles-daemon to configure the APU for power saving or for performance and on affected systems can significantly impact battery life.

As Phoenix systems are enabled from 6.1 onwards, can these both be brought to 6.1.y and 6.4.y?

Thanks!