fbdev changes for 3.13

Nothing particularly stands out in this pull request. The biggest part of the
changes are cleanups.

Maybe one fix to mention is the "fb: reorder the lock sequence to fix potential
dead lock" which hopefully fixes the fb locking issues reported by multiple
persons.

There are also a few commits that have changes to arch/arm/mach-at91 and
arch/avr32, which have been acked by the maintainers.