[POWERPC] Use lowmem_end_addr to limit lmb allocations on ppc32
Now that we have a proper variable that is the address of the top of low memory we can use it to limit the lmb allocations. Signed-off-by: NKumar Gala <galak@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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