arm64: mm: update max pa bits to 48
Now that we support 48-bit physical addressing, update MAX_PHYSMEM_BITS accordingly. Acked-by: NCatalin Marinas <catalin.marinas@arm.com> Signed-off-by: NGanapatrao Kulkarni <ganapatrao.kulkarni@caviumnetworks.com> Signed-off-by: NWill Deacon <will.deacon@arm.com>
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