powerpc/mm: Fix build error with FLATMEM book3s64 config

[Michael Ellerman]

On Wed, 2019-04-03 at 06:05:14 UTC, "Aneesh Kumar K.V" wrote:
> The current value of MAX_PHYSMEM_BITS cannot work with 32 bit configs.
> We used to have MAX_PHYSMEM_BITS not defined without SPARSEMEM and 32
> bit configs never expected a value to be set for MAX_PHYSMEM_BITS.
> 
> Dependent code such as zsmalloc derived the right values based on other
> fields. Instead of finding a value that works with different configs,
> use new values only for book3s_64. For 64 bit booke, use the definition
> of MAX_PHYSMEM_BITS as per commit a7df61a0e2b6 ("[PATCH] ppc64: Increase sparsemem defaults")
> That change was done in 2005 and hopefully will work with book3e 64.
> 
> Fixes: 8bc086899816 ("powerpc/mm: Only define MAX_PHYSMEM_BITS in SPARSEMEM configurations")
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar at linux.ibm.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/6161a37307f3320808b5a7549593b991

cheers