regulator: fixed-helper: Save a few bytes of memory when registering a 'nfc_llc' engine

regulator_register_always_on() calls pass a string literal as the 'name'
parameter.

So kstrdup_const() can be used instead of kfree() to avoid a memory
allocation in such cases.

Signed-off-by: Christophe JAILLET <[email protected]>
Link: https://msgid.link/r/3f990a7b80d72c31371735b24ed08acbb8392c80.1705748586.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Mark Brown <[email protected]>

Author: tititiou36

drivers/regulator/fixed-helper.c

@@ -15,7 +15,7 @@ static void regulator_fixed_release(struct device *dev)
 {
 	struct fixed_regulator_data *data = container_of(dev,
 			struct fixed_regulator_data, pdev.dev);
-	kfree(data->cfg.supply_name);
+	kfree_const(data->cfg.supply_name);
 	kfree(data);
 }
 
@@ -36,7 +36,7 @@ struct platform_device *regulator_register_always_on(int id, const char *name,
 	if (!data)
 		return NULL;
 
-	data->cfg.supply_name = kstrdup(name, GFP_KERNEL);
+	data->cfg.supply_name = kstrdup_const(name, GFP_KERNEL);
 	if (!data->cfg.supply_name) {
 		kfree(data);
 		return NULL;