drm/amd/powerplay: enable power features

the below smu related power features can be enabled now.
1.Prefetcher
2.GFX DPM
3.SOCCLK DPM
4.MP0CLK DPM
5.LCLK DPM
6.GFX ULV
7.CG
8.PPT
9.TDC
10.GFX EDC
11.VR0HOT
12.Fan Control
13.Thermal Control
14.LED Display
15.MMHub PG
16.ATHub PG

Signed-off-by: Kenneth Feng <kenneth.feng@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>