Nathan Whitehorn e60ab831db Fix some memory management issues discovered when trying to boot the PPC
OF loader on systems where address cells and size cells are both 2 (the
Mambo simulator) and fix an error where cons_probe() was called before
init_heap() but used malloc() to set environment variables.

MFC after:	1 month
2010-10-28 23:46:05 +00:00
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