libfdt: add stringlist functions to linker script

The fdt_stringlist_count, fdt_stringslist_search, and fdt_stringlist_get
are added to the libfdt linker script as global symbols

Signed-off-by: Reiner Huober <reiner.huober@nokia.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

libfdt/version.lds

@@ -60,6 +60,9 @@ LIBFDT_1.2 {
 		fdt_address_cells;
 		fdt_size_cells;
 		fdt_stringlist_contains;
+		fdt_stringlist_count;
+		fdt_stringlist_search;
+		fdt_stringlist_get;
 		fdt_resize;
 		fdt_overlay_apply;