libnvdimm, namespace: Drop uuid_t implementation detail

There is no need for caller to know how uuid_t type is constructed. Thus,
whenever we use it the implementation details are not needed. Drop it for good.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

drivers/nvdimm/namespace_devs.c

@@ -1822,8 +1822,8 @@ static bool has_uuid_at_pos(struct nd_region *nd_region, u8 *uuid,
 					&& !guid_equal(&nd_set->type_guid,
 						&nd_label->type_guid)) {
 				dev_dbg(ndd->dev, "expect type_guid %pUb got %pUb\n",
-						nd_set->type_guid.b,
-						nd_label->type_guid.b);
+						&nd_set->type_guid,
+						&nd_label->type_guid);
 				continue;
 			}
 
@@ -2227,8 +2227,8 @@ static struct device *create_namespace_blk(struct nd_region *nd_region,
 	if (namespace_label_has(ndd, type_guid)) {
 		if (!guid_equal(&nd_set->type_guid, &nd_label->type_guid)) {
 			dev_dbg(ndd->dev, "expect type_guid %pUb got %pUb\n",
-					nd_set->type_guid.b,
-					nd_label->type_guid.b);
+					&nd_set->type_guid,
+					&nd_label->type_guid);
 			return ERR_PTR(-EAGAIN);
 		}