motorola-payton: new device (Motorola Moto X4)

This is a port of postmarketOS to the Motorola Moto X4.

What works:

• Booting
• Display
• Touch
• USB Ethernet

What doesn't:

• Sound
• Wi-Fi
• Modem
• Camera

(NOTE: If the display doesn't work, try flashing your phone back to stock, then trying again.)