Most important part of this is that it fixes a regression in Samsung

NAND chip detection, introduced by some rework which went into 3.7. The
initial fix wasn't quite complete, so it's in two parts. In fact the
first part is committed twice (Artem committed his own copy of the same
patch) and I've merged Artem's tree into mine which already had that fix.

I'd have recommitted that to make it somewhat cleaner, but figured by
this point in the release cycle it was better to merge *exactly* the
commits which have been in linux-next.

If I'd recommitted, I'd also omit the sparse warning fix. But it's there,
and it's harmless — just marking one function as 'static' in onenand code.

This also includes a couple more fixes for stable: an AB-BA deadlock in
JFFS2, and an invalid range check in slram.
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