3.11-rc7 big-endian support

[Ben Dooks]

This is a new series of the core work for getting big-endian working
nicely on ARM. This is mainly a rebase on 3.11-rc7 and has not had
a lot of testing on it.

It is available on:

	git://git.baserock.org/delta/linux.git baserock/311-rc7/be/core-v1

Since the previous version:

- Added Victor's atomic64 patch
- Fixed BUG() patch to use <asm/opcodes.h>

I would like to get as much of this merged as possible, so would
it be possible