Add support for EC firmware 15P2ED61.100

[HIbrahimK]

Add support for EC firmware 15P2ED61.100 GameGaraj Slayer 4 (MSI Sword 16 HX derivative)

[glpnk]

I'm curious, can you flash official firmware and turn GameGaraj into MSI? ED6 part of name looks like firmware for pre release or prototype models. I'm not asking to risk, but maybe someone tried?

[HIbrahimK]

To be honest, it is theoretically possible to force-flash the official MSI Sword 16 HX retail firmware. I have even seen people online doing this using low-level deployment tools like AFUWIN or AFUDOS to completely bypass the subsystem ID checks, similar to the process shown in this video (https://www.youtube.com/watch?v=qWf7QgW4EeI).
However, it comes with a huge risk of permanently bricking the laptop, and you often end up with weird hardware bugs like broken keyboard shortcuts or broken display brightness controls.
Since I am running CachyOS, the Windows-only MSI Center isn't an option for me anyway. On Linux, we rely on the msi-ec kernel module and mcontrolcenter for fan and power profiles.
Actually, I have already solved the issue on my own machine, and I submitted this Pull Request purely to help the rest of the open-source community. By upstreaming support for this specific 15P2ED61.100 EC firmware, other GameGaraj Slayer 4 users won't have to risk bricking their devices with dangerous BIOS flashes just to get native fan control working on Linux. My laptop is also still under active warranty, so I personally prefer keeping it completely stock. Hopefully, this gets merged soon to help out others!

[glpnk]

Thanks.

But still weird that MSI is using pre release firmwares on these devices, because they sometimes release updates with bug fixed