libfdt: Enhanced and published fdt_next_tag()
Enhanced the formerly private function _fdt_next_tag() to allow stepping
through the tree, used to produce a human-readable dump, and made
it part of the published interface.
Also added some comments.
diff --git a/libfdt/fdt_sw.c b/libfdt/fdt_sw.c
index 41d4891..672f4dd 100644
--- a/libfdt/fdt_sw.c
+++ b/libfdt/fdt_sw.c
@@ -203,7 +203,7 @@
/* Walk the structure, correcting string offsets */
offset = 0;
- while ((tag = _fdt_next_tag(fdt, offset, &nextoffset)) != FDT_END) {
+ while ((tag = fdt_next_tag(fdt, offset, &nextoffset, NULL)) != FDT_END) {
if (tag == FDT_PROP) {
struct fdt_property *prop = fdt_offset_ptr(fdt, offset,
sizeof(*prop));