x11/framework-autorotate: New port

Framework Laptop 12 X11 display autorotate: Chrome EC memmap
accelerometer and TBMD drive RandR on the built-in panel, ILIT
touch/stylus remap, XDM greeter recovery, and an optional
per-user chrome hook.

Reviewed by: jrm
Differential Revision: https://reviews.freebsd.org/D58651