dtc: Strip redundant "name" properties

If an input device tree has "name" properties which are correct, then
they are redundant (because they can be derived from the unit name).
Therefore, extend the checking code for correctness of "name"
properties to remove them if they are correct.  dtc will still insert
name properties in the output if that's of a sufficiently old version
to require them.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

checks.c

@@ -316,9 +316,14 @@ NODE_CHECK(explicit_phandles, NULL, ERROR);
 static void check_name_properties(struct check *c, struct node *root,
 				  struct node *node)
 {
-	struct property *prop;
+	struct property **pp, *prop = NULL;
+
+	for (pp = &node->proplist; *pp; pp = &((*pp)->next))
+		if (streq((*pp)->name, "name")) {
+			prop = *pp;
+			break;
+		}
 
-	prop = get_property(node, "name");
 	if (!prop)
 		return; /* No name property, that's fine */
 
@@ -326,6 +331,12 @@ static void check_name_properties(struct check *c, struct node *root,
 	    || (memcmp(prop->val.val, node->name, node->basenamelen) != 0))
 		FAIL(c, "\"name\" property in %s is incorrect (\"%s\" instead"
 		     " of base node name)", node->fullpath, prop->val.val);
+
+	/* The name property is correct, and therefore redundant.  Delete it */
+	*pp = prop->next;
+	free(prop->name);
+	data_free(prop->val);
+	free(prop);
 }
 CHECK_IS_STRING(name_is_string, "name", ERROR);
 NODE_CHECK(name_properties, NULL, ERROR, &name_is_string);