drm/amd/powerplay: Add notify PWE function to SMU10

Functionality to message smc to enable pwe after gpu suspense.
It is used in case when display resumes from S3 and wants to start
audio driver by enabling pwe.

Signed-off-by: Mikita Lipski <mikita.lipski@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>