spapr: Remove obsolete ram_limit field from sPAPRMachineState
The ram_limit field was imported from sPAPREnvironment where it predates the machine's ram size being available generically from machine->ram_size. Worse, the existing code was inconsistent about where it got the ram size from. Sometimes it used spapr->ram_limit, sometimes the global 'ram_size' and sometimes a local 'ram_size' masking the global. This cleans up the code to consistently use machine->ram_size, eliminating spapr->ram_limit in the process. Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au> Signed-off-by: NAlexander Graf <agraf@suse.de>
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