of: Constify safe_name() kobject arg

The kobject is not modified by safe_name() function, so make it const.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20241010-dt-const-v1-6-87a51f558425@kernel.org
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

drivers/of/kobj.c

@@ -37,7 +37,7 @@ static ssize_t of_node_property_read(struct file *filp, struct kobject *kobj,
 }
 
 /* always return newly allocated name, caller must free after use */
-static const char *safe_name(struct kobject *kobj, const char *orig_name)
+static const char *safe_name(const struct kobject *kobj, const char *orig_name)
 {
 	const char *name = orig_name;
 	struct kernfs_node *kn;