Write pin assignment, hpd, and orientation from type-c class to
drmdp platform device attributes using epoll when displayport
driver binds to device, and determine whether or not to shut down
epoll on displayport driver change uevents.
Test: manual testing with form factor device
Bug: 260915739
Change-Id: Iec9fc76166481a4611bb2fc023aea044b497f2c0