Revert "Fix bran-damage in adreno_ringbuffer.c"

This reverts commit 691b267f94b8e4e914bf886bbd219a12ea8d0b04.
Revert "Partial video driver cleanups"

This reverts commit e5cea51ca1a54e175c9bb32e7a3a2d0e3d38e93c.
Disable exFAT

It's not completely stable, and it's not useful on AOSP.  CM (and
related ROMs) are moving towards fuse-exfat instead.
Clean up some derp in input drivers
cpufreq: avoid merging hotplug attrs twice
rq-stats: handle stalled mpdecision

Trickster is currently leaving CPU1 online after applying settings.
This stalls mpdecision, leaveing CPU1 online indefinitely.  When this
happens, automatically migrate to auto-hotplug.

Offlining CPU1 from userspace after mpdecision stalls will wake
mpdecision and trigger the migration away from auto-hotplug.