libfdt: Add fdt_get_name() to retrieve a node's name

This patch adds a new fdt_get_name() function to libfdt which will
return a node's name string (including unit address, if any).

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
diff --git a/tests/run_tests.sh b/tests/run_tests.sh
index df368f9..4198f5f 100755
--- a/tests/run_tests.sh
+++ b/tests/run_tests.sh
@@ -32,6 +32,7 @@
     run_test find_property $TREE
     run_test subnode_offset $TREE
     run_test path_offset $TREE
+    run_test get_name $TREE
     run_test getprop $TREE
     run_test notfound $TREE