FR: Add AMD GPU metrics

[geransmith]

Hello! I see that this config has support for Nvidia GPU stats. I'd love if you could add support for reading GPU information (temp, usage, etc) via either lm-sensors or radeontop. I don't know quite enough lue to actually do a pull request or I'd offer to help more.

If it helps, here are some example outputs from those.

sensors has information on fan speed, temp, etc.

$ sensors -u amdgpu-pci-0a00
amdgpu-pci-0d00
Adapter: PCI adapter
vddgfx:
  in0_input: 0.775
fan1:
  fan1_input: 0.000
  fan1_min: 0.000
  fan1_max: 3400.000
edge:
  temp1_input: 47.000
  temp1_crit: 100.000
  temp1_crit_hyst: -273.150
  temp1_emergency: 105.000
junction:
  temp2_input: 53.000
  temp2_crit: 110.000
  temp2_crit_hyst: -273.150
  temp2_emergency: 115.000
mem:
  temp3_input: 52.000
  temp3_crit: 100.000
  temp3_crit_hyst: -273.150
  temp3_emergency: 105.000
PPT:
  power1_average: 35.000
  power1_cap: 264.000

radeontop shows information on GPU usage, VRAM usage, clock speed, etc. You can run it in dump mode and output to stdout.

$ radeontop -d -l1
Dumping to -l1, until termination.
1705984147.783063: bus 0d, gpu 5.83%, ee 0.00%, vgt 4.17%, ta 3.33%, sx 2.50%, sh 4.17%, spi 4.17%, sc 3.33%, pa 0.83%, db 3.33%, cb 3.33%, vram 8.54% 1393.56mb, gtt 1.00% 160.15mb, mclk 100.00% 1.000ghz, sclk 1.41% 0.038ghz

[ChaosInfinited]

Hi, I've just opened a PR for this:
#32
It's using amdgpu_top instead of radeontop, maybe you'll have some use out of it :)