Comment 0 for bug 1940204

[Impact]
With AMDGPU and don't use it as a display output,
After multiple Suspend&reume, system would hang.

[Fix]
Disable BACO for polaris12 series.

[Test Case]
1. Must plug AMD GPU and don't use it as display output
2. Plug DP/hdmi on igpu.
3. Suspend&resume machine.
4. check if system hangs.

[Where problems could occur]
Disable BACO would cause higher power consumption.