fan is running and I'm getting "CPU fan speed: 0 RPM"

### System information:
output of `auto-cpufreq --debug`
```
-------------------------------------------------------------------------------

Linux distro: Arch Linux rolling n/a
Linux kernel: 6.6.44-3-lts
Processor: AMD Ryzen 5 5600H with Radeon Graphics
Cores: 12
Architecture: x86_64
Driver: amd-pstate-epp

------------------------------ Current CPU stats ------------------------------

CPU max frequency: 4280 MHz
CPU min frequency: 400 MHz

Core Usage Temperature Frequency
CPU0 3.0% 50 °C 400 MHz
CPU1 2.0% 50 °C 400 MHz
CPU2 0.0% 50 °C 3360 MHz
CPU3 0.0% 50 °C 3275 MHz
CPU4 0.0% 50 °C 400 MHz
CPU5 5.8% 50 °C 400 MHz
CPU6 2.0% 50 °C 3291 MHz
CPU7 0.0% 50 °C 400 MHz
CPU8 2.0% 50 °C 3351 MHz
CPU9 0.0% 50 °C 3308 MHz
CPU10 0.0% 50 °C 400 MHz
CPU11 2.9% 50 °C 400 MHz

CPU fan speed: 0 RPM

auto-cpufreq version: Version : 2.3.0-1

Python: 3.12.4
psutil package: 5.9.8
platform package: 1.0.8
click package: 8.1.7
distro package: 1.9.0

Computer type: Notebook
Battery is: charging

auto-cpufreq system resource consumption:
cpu usage: 0.0 %
memory use: 0.2 %

Total CPU usage: 1.1 %
Total system load: 0.63
Average temp. of all cores: 50.00 °C

Currently using: performance governor
CPU turbo is controlled by amd-pstate-epp driver
Currently turbo boost is: off
```

Start by reproducing `auto-cpufreq --debug` on Arch Linux with the reported kernel and AMD Ryzen hardware, then trace how the command obtains and prints fan speed. Compare the 0 RPM output with the observed running fan; done means the reading is corrected or the hardware or sensor limitation is clearly identified.

Rédigé par le modèle d'indexation à partir du texte de l'issue.