[POWERPC] Add dt_xlate_addr() to bootwrapper

dt_xlate_reg() looks up the 'reg' property in the specified node
to get the address and size to translate.  Add dt_xlate_addr()
which is passed in the address and size to translate.

Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/boot/ops.h b/arch/powerpc/boot/ops.h
index 20e8719..73bd47a 100644
--- a/arch/powerpc/boot/ops.h
+++ b/arch/powerpc/boot/ops.h
@@ -82,8 +82,8 @@
 void *simple_alloc_init(char *base, unsigned long heap_size,
 			unsigned long granularity, unsigned long max_allocs);
 extern void flush_cache(void *, unsigned long);
-int dt_xlate_reg(void *node, int res, unsigned long *addr,
-                 unsigned long *size);
+int dt_xlate_reg(void *node, int res, unsigned long *addr, unsigned long *size);
+int dt_xlate_addr(void *node, u32 *buf, int buflen, unsigned long *xlated_addr);
 
 static inline void *finddevice(const char *name)
 {