Add support for Strix Halo CPUs

[geeksville]

Hi @FlyGoat,

It was good chatting with you via email. I've made some progress on adding Strix Halo CPU support. I'm attaching this PR but I'll keep adding to it in my workspace. CPU undervolting works well (My machine can run reliablity down to about -40 0xfffd8 for coal - if I go lower than that I start to see failures in the mprime stress test)

I'm now working on adding/testing similar undervolt (and power, temperature, voltage reading) for the GPU side. We'll see how that goes...

• Undervolting CPU with --set-coal seems to work
• Added support for reading per cor CPU power, voltage and temperature (16 cores)
• Basic dumping with -i or --dump-tables seems to work.

$ sudo ./ryzenadj -i
CPU Family: Strix Halo
SMU BIOS Interface Version: 25
Version: v0.16.0
PM Table Version: 64020c

Name	Value	Parameter
STAPM LIMIT	71.000	stapm-limit
STAPM VALUE	20.293
PPT LIMIT FAST	71.000	fast-limit
PPT VALUE FAST	28.647
PPT LIMIT SLOW	52.000	slow-limit
PPT VALUE SLOW	22.021
StapmTimeConst	nan	stapm-time
SlowPPTTimeConst	nan	slow-time
PPT LIMIT APU	nan	apu-slow-limit
PPT VALUE APU	nan
TDC LIMIT VDD	nan	vrm-current
TDC VALUE VDD	nan
TDC LIMIT SOC	nan	vrmsoc-current
TDC VALUE SOC	nan
EDC LIMIT VDD	nan	vrmmax-current
EDC VALUE VDD	nan
EDC LIMIT SOC	nan	vrmsocmax-current
EDC VALUE SOC	nan
THM LIMIT CORE	95.000	tctl-temp
THM VALUE CORE	52.785
STT LIMIT APU	95.000	apu-skin-temp
STT VALUE APU	52.785
STT LIMIT dGPU	95.000	dgpu-skin-temp
STT VALUE dGPU	55.655
CCLK Boost SETPOINT	nan	power-saving /
CCLK BUSY VALUE	nan	max-performance

[FlyGoat]

Thanks for contribution! Nice to talk to you.

I'll investigate rest service calls.