Bluetooth: hci_qca: unduplicate calls to hci_uart_register_device()

Now that all three branches of the switch end up doing the same thing,
we can move the call to hci_uart_register_device() past it and unify the
error message.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

drivers/bluetooth/hci_qca.c

@@ -2396,12 +2396,6 @@ static int qca_serdev_probe(struct serdev_device *serdev)
 			dev_err(&serdev->dev, "failed to acquire clk\n");
 			return PTR_ERR(qcadev->susclk);
 		}
-
-		err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto);
-		if (err) {
-			BT_ERR("wcn3990 serdev registration failed");
-			return err;
-		}
 		break;
 
 	case QCA_QCA6390:
@@ -2409,12 +2403,6 @@ static int qca_serdev_probe(struct serdev_device *serdev)
 							   "bluetooth");
 		if (IS_ERR(qcadev->bt_power->pwrseq))
 			return PTR_ERR(qcadev->bt_power->pwrseq);
-
-		err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto);
-		if (err) {
-			BT_ERR("qca6390 serdev registration failed");
-			return err;
-		}
 		break;
 
 	default:
@@ -2447,11 +2435,12 @@ static int qca_serdev_probe(struct serdev_device *serdev)
 		if (err)
 			return err;
 
-		err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto);
-		if (err) {
-			BT_ERR("Rome serdev registration failed");
-			return err;
-		}
+	}
+	
+	err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto);
+	if (err) {
+		BT_ERR("serdev registration failed");
+		return err;
 	}
 
 	hdev = qcadev->serdev_hu.hdev;