This allows for better energy efficiency (no more 50Hz tick poll),
as well as lower input lag / higher precision - touch events are
native linux ones.
In addition, auto off/suspend plugin is used in this mode, as we need
to trigger (timed) sleep / poweroff on our own, since the OS ones
will no longer work whenever koreader has focus.
This is for rooted devices only, and possibly somewhat FW
specific, so enabled only on PB740-2 where it's reasonably tested.
* Enable AutoSuspend plugin on rM
Fix#6769
Re: #6028
* Use the PowerEvent handler on rM
It makes much more sense than the fire & forget & hope for the best
approach copied from the Kindle platform, because we *are* controlling
suspend ourselves (mostly), unlike on Kindle ;).
Fix#6676
* Enable HW inversion on the rM
I mean, we kinda forgot to ever test that, but I don't really see why it
wouldn't work ;).