X270 Initial release

• Added X270 USBMap
• Added X270 YogaSMC SSDT
• AirportItlwm.kext replaced with itlwm.kext
• Config adapted to X270
• Config cleanup
• Fixed keyboard mapping
• Removed VoodooRMI (Doesnt work as good as Acidanthera implementation)
• Removed some kexts
• Updated kexts to latest release
• Updated to OpenCore 7.0