Refactored Gigabyte Fusion2USB controller

Chris Mrequested to merge
Dr_No/OpenRGB:gb_fusion2_refactor into master
  • Refactored RGBController_GigabyteRGBFusion2USBBoards & RGBController_GigabyteRGBFusion2USBLayouts into single GigabyteFusion2USB_Devices to align with structure of RazerDevices and CorsairV2Devices.
  • Replaced definition for gb_fusion2_layout
  • Adjusted code paths to suit new variable structures
  • Removed redundant files

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