Doesn't work with SecureBoot enabled

Created by: hadess

From https://bugzilla.redhat.com/show_bug.cgi?id=1476366

As it stands, this is working as expected. When secureboot is on, debugfs is
locked down. Per the patch, "Normal device interaction should be done through
configfs or a miscdev, not debugfs." I think something needs to be done for
vgaswitcheroo for secureboot.

We'll need to adapt to whatever the new method will be.