nfc: hci: Save a few bytes of memory when registering a 'nfc_llc' engine

nfc_llc_register() 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 <christophe.jaillet@wanadoo.fr>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

net/nfc/hci/llc.c

@@ -33,7 +33,7 @@ int __init nfc_llc_init(void)
 static void nfc_llc_del_engine(struct nfc_llc_engine *llc_engine)
 {
 	list_del(&llc_engine->entry);
-	kfree(llc_engine->name);
+	kfree_const(llc_engine->name);
 	kfree(llc_engine);
 }
 
@@ -53,7 +53,7 @@ int nfc_llc_register(const char *name, const struct nfc_llc_ops *ops)
 	if (llc_engine == NULL)
 		return -ENOMEM;
 
-	llc_engine->name = kstrdup(name, GFP_KERNEL);
+	llc_engine->name = kstrdup_const(name, GFP_KERNEL);
 	if (llc_engine->name == NULL) {
 		kfree(llc_engine);
 		return -ENOMEM;