of/flattree: Merge unflatten_device_tree

Merge common code between PowerPC and MicroBlaze

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Reviewed-by: Wolfram Sang <w.sang@pengutronix.de>
Tested-by: Michal Simek <monstr@monstr.eu>
diff --git a/include/linux/of.h b/include/linux/of.h
index e7facd8..bec2157 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -63,6 +63,9 @@
 #endif
 };
 
+/* Pointer for first entry in chain of all nodes. */
+extern struct device_node *allnodes;
+
 static inline int of_node_check_flag(struct device_node *n, unsigned long flag)
 {
 	return test_bit(flag, &n->_flags);