New gp-peak device (Geeksphone Peak)

Hello,

The Geeksphone Peak is one of the very first Firefox OS phones. Now that Firefox OS is discontinued, it is not really useful anymore so postmarketOS is a great oppotunity to use it again.

This is my first port so I'm learning as I go. It currently boots and SSH over USB works but the screen stays black. (weston fails with this error: Failed to open frame buffer device ‘/dev/fb0’: Permission denied)