libnvdimm, label: populate the type_guid property for v1.2 namespaces

The type_guid refers to the "Address Range Type GUID" for the region
backing a namespace as defined the ACPI NFIT (NVDIMM Firmware Interface
Table). This 'type' identifier specifies an access mechanism for the
given namespace. This capability replaces the confusing usage of the
'NSLABEL_FLAG_LOCAL' flag to indicate a block-aperture-mode namespace.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>

include/linux/libnvdimm.h

@@ -17,6 +17,7 @@
 #include <linux/kernel.h>
 #include <linux/sizes.h>
 #include <linux/types.h>
+#include <linux/uuid.h>
 
 enum {
 	/* when a dimm supports both PMEM and BLK access a label is required */
@@ -77,6 +78,8 @@ struct nd_interleave_set {
 	u64 cookie2;
 	/* compatibility with initial buggy Linux implementation */
 	u64 altcookie;
+
+	guid_t type_guid;
 };
 
 struct nd_mapping_desc {