USB: serial: iuu_phoenix: simplify endpoint check

Simplify the endpoint sanity check by letting core verify that the
required endpoints are present.
Signed-off-by: Johan Hovold <johan@kernel.org>

drivers/usb/serial/iuu_phoenix.c

@@ -68,16 +68,6 @@ struct iuu_private {
 	u32 clk;
 };
 
-static int iuu_attach(struct usb_serial *serial)
-{
-	unsigned char num_ports = serial->num_ports;
-
-	if (serial->num_bulk_in < num_ports || serial->num_bulk_out < num_ports)
-		return -ENODEV;
-
-	return 0;
-}
-
 static int iuu_port_probe(struct usb_serial_port *port)
 {
 	struct iuu_private *priv;
@@ -1183,6 +1173,8 @@ static struct usb_serial_driver iuu_device = {
 		   },
 	.id_table = id_table,
 	.num_ports = 1,
+	.num_bulk_in = 1,
+	.num_bulk_out = 1,
 	.bulk_in_size = 512,
 	.bulk_out_size = 512,
 	.open = iuu_open,
@@ -1193,7 +1185,6 @@ static struct usb_serial_driver iuu_device = {
 	.tiocmset = iuu_tiocmset,
 	.set_termios = iuu_set_termios,
 	.init_termios = iuu_init_termios,
-	.attach = iuu_attach,
 	.port_probe = iuu_port_probe,
 	.port_remove = iuu_port_remove,
 };