NFC: st21nfca: Remove useless err == 0 condition

On top of st21nfca_im_recv_atr_res_cb and st21nfca_im_recv_dep_res_cb a
condition if (err != 0) is present. Because err is never modified in the
code err will always be 0 at the end.

The condition can be removed.
Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/nfc/st21nfca/st21nfca_dep.c

@@ -485,8 +485,7 @@ static void st21nfca_im_recv_atr_res_cb(void *context, struct sk_buff *skb,
 						ST21NFCA_PP2LRI(atr_res->ppi));
 		break;
 	default:
-		if (err == 0)
-			kfree_skb(skb);
+		kfree_skb(skb);
 		break;
 	}
 }
@@ -616,8 +615,7 @@ static void st21nfca_im_recv_dep_res_cb(void *context, struct sk_buff *skb,
 	}
 
 exit:
-	if (err == 0)
-		kfree_skb(skb);
+	kfree_skb(skb);
 }
 
 int st21nfca_im_send_dep_req(struct nfc_hci_dev *hdev, struct sk_buff *skb)