of: kobj: make of_node_is_(initialized|attached) parameters const

of_node_is_initialized() and of_node_is_attached() don't modify the node
objects passed to them, so those parameters should be const.
Signed-off-by: Nathan Lynch <nathanl@linux.ibm.com>
Link: https://lore.kernel.org/r/20211014173023.2117799-1-nathanl@linux.ibm.comSigned-off-by: Rob Herring <robh@kernel.org>

drivers/of/kobj.c

@@ -5,13 +5,13 @@
 #include "of_private.h"
 
 /* true when node is initialized */
-static int of_node_is_initialized(struct device_node *node)
+static int of_node_is_initialized(const struct device_node *node)
 {
 	return node && node->kobj.state_initialized;
 }
 
 /* true when node is attached (i.e. present on sysfs) */
-int of_node_is_attached(struct device_node *node)
+int of_node_is_attached(const struct device_node *node)
 {
 	return node && node->kobj.state_in_sysfs;
 }

drivers/of/of_private.h

@@ -60,7 +60,7 @@ static inline int of_property_notify(int action, struct device_node *np,
 #endif /* CONFIG_OF_DYNAMIC */
 
 #if defined(CONFIG_OF_KOBJ)
-int of_node_is_attached(struct device_node *node);
+int of_node_is_attached(const struct device_node *node);
 int __of_add_property_sysfs(struct device_node *np, struct property *pp);
 void __of_remove_property_sysfs(struct device_node *np, struct property *prop);
 void __of_update_property_sysfs(struct device_node *np, struct property *newprop,