hdat/vpd: Don't warn and don't create a dummy "model-name"

If the model property doesn't contain a known model number
that we can translate into a name, assume it's already a name,
stop warning and don't create an extraneous property.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

hdata/vpd.c

@@ -529,9 +529,6 @@ static void dt_add_model_name(void)
 		mi = machine_info_lookup(model->prop);
 		if (mi) {
 			model_name = mi->name;
-		} else {
-			model_name = "Unknown";
-			prlog(PR_WARNING, "VPD: Model name %s not known\n", model->prop);
 		}
 	}