[POWERPC] bootwrapper: Add get_path()

This will be used by the PlanetCore firmware support to construct
a linux,stdout-path from the serial node that it finds.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/boot/ops.h

@@ -47,6 +47,7 @@ struct dt_ops {
 	                                 const char *propname,
 	                                 const char *propval, int proplen);
 	unsigned long (*finalize)(void);
+	char *(*get_path)(const void *phandle, char *buf, int len);
 };
 extern struct dt_ops dt_ops;
 
@@ -170,6 +171,14 @@ static inline void *find_node_by_linuxphandle(const u32 linuxphandle)
 			(char *)&linuxphandle, sizeof(u32));
 }
 
+static inline char *get_path(const void *phandle, char *buf, int len)
+{
+	if (dt_ops.get_path)
+		return dt_ops.get_path(phandle, buf, len);
+
+	return NULL;
+}
+
 static inline void *malloc(unsigned long size)
 {
 	return (platform_ops.malloc) ? platform_ops.malloc(size) : NULL;