Ensure all tests have matching reg and unit address

ePAPR 1.1 section 2.2.1.1 "Node Name Requirements" specifies that any
node that has a reg property must include a unit address in its name
with value matching the first entry in its reg property. Conversely, if
a node does not have a reg property, the node name must not include a
unit address.

Adjust all the dtc test-cases to conform to this rule.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

tests/include7.dts

@@ -1,5 +1,6 @@
 	subnode@1 {
 		compatible = "subnode1";
+		reg = <1>;
 		prop-int = [deadbeef];
 
 		subsubnode {