[PATCH v5.1 11/13] of: Add nop implementation of of_get_next_parent()

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of_get_next_parent() was only defined if CONFIG_OF was set. Using the
function thus requires #ifdef CONFIG_OF ... #endif in all cases. Avoid
having to use pre-processor macros around the function by providing a nop
implementation of of_get_next_parent().

Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
---
since v5:

- Improved commit message.

 include/linux/of.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/linux/of.h b/include/linux/of.h
index e5d4225f..cc212a0 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -586,6 +586,12 @@ static inline struct device_node *of_get_parent(const struct device_node *node)
 	return NULL;
 }
 
+static inline struct device_node *of_get_next_parent(
+	const struct device_node *node)
+{
+	return NULL;
+}
+
 static inline struct device_node *of_get_next_child(
 	const struct device_node *node, struct device_node *prev)
 {
-- 
2.7.4

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