dm: core: Drop the const from ofnode

Now that we support writing to ofnodes, the const is not accurate. Drop
it to avoid undesirable casting.

Also drop the ofnode_to_npw() which is now the same as ofnode_to_np().

Signed-off-by: Simon Glass <sjg@chromium.org>

include/dm/ofnode.h

@@ -35,7 +35,7 @@ struct ofnode_phandle_args {
  * @node: Reference containing struct device_node * (possibly invalid)
  * Return: pointer to device node (can be NULL)
  */
-static inline const struct device_node *ofnode_to_np(ofnode node)
+static inline struct device_node *ofnode_to_np(ofnode node)
 {
 #ifdef OF_CHECKS
 	if (!of_live_active())
@@ -44,24 +44,6 @@ static inline const struct device_node *ofnode_to_np(ofnode node)
 	return node.np;
 }
 
-/**
- * ofnode_to_npw() - convert an ofnode to a writeable live DT node pointer
- *
- * This cannot be called if the reference contains an offset.
- *
- * @node: Reference containing struct device_node * (possibly invalid)
- * Return: pointer to device node (can be NULL)
- */
-static inline struct device_node *ofnode_to_npw(ofnode node)
-{
-#ifdef OF_CHECKS
-	if (!of_live_active())
-		return NULL;
-#endif
-	/* Drop constant */
-	return (struct device_node *)node.np;
-}
-
 /**
  * ofnode_to_offset() - convert an ofnode to a flat DT offset
  *
@@ -117,7 +99,7 @@ static inline ofnode offset_to_ofnode(int of_offset)
  * @np: Live node pointer (can be NULL)
  * Return: reference to the associated node pointer
  */
-static inline ofnode np_to_ofnode(const struct device_node *np)
+static inline ofnode np_to_ofnode(struct device_node *np)
 {
 	ofnode node;
 

include/dm/ofnode_decl.h

@@ -39,7 +39,7 @@
  *	is not a really a pointer to a node: it is an offset value. See above.
  */
 typedef union ofnode_union {
-	const struct device_node *np;
+	struct device_node *np;
 	long of_offset;
 } ofnode;