drm/amdgpu/powerplay: Add special avfs cases for some polaris asics (v3)

Add special avfs handling for some polaris variants.

v2: fix copy paste typo.
v3: fix asic rid check

Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>