libfdt: Add version.lds file

Add the initial symbol versioning file as groundwork for creating
a libfdt shared library

Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>

libfdt/version.lds

@@ -0,0 +1,54 @@
+LIBFDT_1.2 {
+	global:
+		fdt_next_node;
+		fdt_check_header;
+		fdt_move;
+		fdt_string;
+		fdt_num_mem_rsv;
+		fdt_get_mem_rsv;
+		fdt_subnode_offset_namelen;
+		fdt_subnode_offset;
+		fdt_path_offset;
+		fdt_get_name;
+		fdt_get_property_namelen;
+		fdt_get_property;
+		fdt_getprop_namelen;
+		fdt_getprop;
+		fdt_get_phandle;
+		fdt_get_alias_namelen;
+		fdt_get_alias;
+		fdt_get_path;
+		fdt_supernode_atdepth_offset;
+		fdt_node_depth;
+		fdt_parent_offset;
+		fdt_node_offset_by_prop_value;
+		fdt_node_offset_by_phandle;
+		fdt_node_check_compatible;
+		fdt_node_offset_by_compatible;
+		fdt_setprop_inplace;
+		fdt_nop_property;
+		fdt_nop_node;
+		fdt_create;
+		fdt_add_reservemap_entry;
+		fdt_finish_reservemap;
+		fdt_begin_node;
+		fdt_property;
+		fdt_end_node;
+		fdt_finish;
+		fdt_open_into;
+		fdt_pack;
+		fdt_add_mem_rsv;
+		fdt_del_mem_rsv;
+		fdt_set_name;
+		fdt_setprop;
+		fdt_delprop;
+		fdt_add_subnode_namelen;
+		fdt_add_subnode;
+		fdt_del_node;
+		fdt_strerror;
+		fdt_offset_ptr;
+		fdt_next_tag;
+
+	local:
+		*;
+};