[PATCH v2][POWERPC] Fix initial lmb add region with a non-zero base

[Paul Mackerras]

Kumar Gala writes:

> np.  Are we trying to get this into 2.6.25 or .26?

I was going to put it into my powerpc-next branch and put it in
2.6.26.  I don't see any need for it to go in 2.6.25.

Paul.