of/flattree: merge early_init_dt_scan_memory() common code

Merge common code between PowerPC and Microblaze architectures.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Michal Simek <monstr@monstr.eu>
diff --git a/include/linux/of_fdt.h b/include/linux/of_fdt.h
index fbf2961..bf26bd5 100644
--- a/include/linux/of_fdt.h
+++ b/include/linux/of_fdt.h
@@ -75,6 +75,9 @@
 extern int early_init_dt_scan_chosen(unsigned long node, const char *uname,
 				     int depth, void *data);
 extern void early_init_dt_check_for_initrd(unsigned long node);
+extern int early_init_dt_scan_memory(unsigned long node, const char *uname,
+				     int depth, void *data);
+extern void early_init_dt_add_memory_arch(u64 base, u64 size);
 extern u64 dt_mem_next_cell(int s, u32 **cellp);
 
 /* Early flat tree scan hooks */