We need to update our nommu patches against to latest upstream

Hi Bernd and Mike,

These days, I'm trying to sync with upstream 2.6.29-rc3+ git-tree. And
found that several ideas from our Blackfin side about nommu memory
management were merged from David Howells. Mike also test those
patches.

But David's implementation is different from Bernd's. He introduced a
new struct name vm_region to track a mapped region.
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=8feae13110d60cc6287afabc2887366b0eb226c2

Several patches in our local tree needs to be update.
http://git.kernel.org/?p=linux/kernel/git/cooloney/blackfin-2.6.git;a=commitdiff;h=92e2da0ee250a9b5ba7e5919496fda129f9bef80
http://git.kernel.org/?p=linux/kernel/git/cooloney/blackfin-2.6.git;a=commitdiff;h=cf8353f41071d13d6cfa0397d757c78275e39bc1

I plan to update these patches roughly and we can make them more
stable in the next release.

-Bryan