fdt_support: add prototypes for __weak functions

Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
diff --git a/include/fdt_support.h b/include/fdt_support.h
index c3d1fbc..55cef94 100644
--- a/include/fdt_support.h
+++ b/include/fdt_support.h
@@ -144,6 +144,8 @@
 
 void of_bus_default_count_cells(void *blob, int parentoffset,
 					int *addrc, int *sizec);
+int ft_verify_fdt(void *fdt);
+int arch_fixup_memory_node(void *blob);
 
 #endif /* ifdef CONFIG_OF_LIBFDT */