drm/amdgpu/swSMU/navi: add feature toggles for more things

Add toggles for more power features.  Helpful in debugging.

Reviewed-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Kevin Wang <kevin1.wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>