acpi, nfit: Add function to look up nvdimm device and provide SMBIOS handle

EDAC driver needs to look up attributes of NVDIMMs provided in SMBIOS.

Provide a function that looks up an acpi_nfit_memory_map from a device
handle (node/socket/mc/channel/dimm) and returns the SMBIOS handle.
Also pass back the "flags" so we can see if the NVDIMM is OK.

Acked-by: Dan Williams <[email protected]>
Signed-off-by: Tony Luck <[email protected]>
Cc: "Rafael J. Wysocki" <[email protected]>
Cc: Aristeu Rozanski <[email protected]>
Cc: Dan Williams <[email protected]>
Cc: Erik Schmauss <[email protected]>
Cc: Jean Delvare <[email protected]>
Cc: Len Brown <[email protected]>
Cc: Mauro Carvalho Chehab <[email protected]>
Cc: Qiuxu Zhuo <[email protected]>
Cc: Robert Moore <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Borislav Petkov <[email protected]>

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