Add support for MSI AM5/LGA1851 Motherboards using the NCT6687D SIO Controller (#1644)

* Add Identification Support for 15 new MSI AM5/LGA1851 Motherboards with the NCT6687D SIO Controller

* Create dummy chip entry NCT6687DR

* Assign NCT6687DR SIO to 15 newly added MSI AM5/LGA1851 Motherboards

This also requires passing Motherboard into DetectWinbondFintek() as we want to maintain prior compatibility while also assigning NCT6687DR to the new motherboards

* Add proper voltage, fan, and temperature sensor layouts for motherboards assigned the NCT6687DR controller

* Add support for NCT6687DR including dedicated fan control function for system fan manipulation

NCT6687DRFanCtrl() is only called when chip == NCT6687DR, otherwise legacy control is maintained. This function works by setting the 7-point fan curve of the system fans to the same requested value where the system fan has no choice but to comply

* Rectify code style in new functions to follow standards

* Update Nct677X.cs

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Co-authored-by: Alcolawl <tdean@live.esu.edu>
Co-authored-by: PhyxionNL <7643972+PhyxionNL@users.noreply.github.com>