Add support for Legion 5 15IRX10 (83LY, BIOS QNCN)

[udda]

Summary

This PR adds support for Lenovo Legion 5 15IRX10 systems using QNCN firmware.

Changes

• Added support for BIOS family QNCN in the kernel module configuration
• Added the corresponding allowlist/DMI matching so the module loads normally on this model (without force=1)
• Updated README with notes about a possible platform profile conflict with Lenovo WMI Gamezone

Tested on

• Model: Lenovo Legion 5 15IRX10
• CPU: Intel Core i9-14900HX
• GPU: NVIDIA GeForce RTX 5070 Max-Q / Mobile
• DMI product name: 83LY
• BIOS: QNCN28WW
• Kernel: 6.19.9-1-default
• EC Chip ID: 0x5508
• EC Chip Version: 0x2b0

Validation results

• Module probes and loads normally for the device (is_allowed: 1, config QNCN selected)
• hwmon/sysfs interfaces are available and functional
• Fan RPM and temperatures report coherently with the selected access method
• Power mode switching works (including platform profile integration)

Note about platform profile providers

On this machine, legion_laptop can coexist with lenovo_wmi_gamezone, but both may register platform profile handlers with different profile sets.
This may cause user-space issues (for example KDE power-saver errors or missing low-power transitions).

The README documents the workaround: blacklist lenovo_wmi_gamezone when using legion_laptop as the primary platform profile provider.