dt: Add empty of_find_node_by_name() function

This commit adds an empty of_find_node_by_name() function for !CONFIG_OF
builds.

Signed-off-by: Peter Ujfalusi <[e-mail]>
Signed-off-by: Samuel Ortiz <[e-mail]>

include/linux/of.h

···
 	return "<no-node>";
 }
 
+static inline struct device_node *of_find_node_by_name(struct device_node *from,
+	const char *name)
+{
+	return NULL;
+}
+
 static inline bool of_have_populated_dt(void)
 {
 	return false;