USB: serial: keyspan_pda: simplify endpoint check

Simplify the endpoint sanity check by letting core verify that the
required endpoints are present.

Signed-off-by: Johan Hovold <[e-mail]>

drivers/usb/serial/keyspan_pda.c

···
 MODULE_FIRMWARE("keyspan_pda/xircom_pgs.fw");
 #endif
 
-static int keyspan_pda_attach(struct usb_serial *serial)
-{
-	unsigned char num_ports = serial->num_ports;
-
-	if (serial->num_bulk_out < num_ports ||
-			serial->num_interrupt_in < num_ports) {
-		dev_err(&serial->interface->dev, "missing endpoints\n");
-		return -ENODEV;
-	}
-
-	return 0;
-}
-
 static int keyspan_pda_port_probe(struct usb_serial_port *port)
 {
 
···
 	.description =		"Keyspan PDA",
 	.id_table =		id_table_std,
 	.num_ports =		1,
+	.num_bulk_out =		1,
+	.num_interrupt_in =	1,
 	.dtr_rts =		keyspan_pda_dtr_rts,
 	.open =			keyspan_pda_open,
 	.close =		keyspan_pda_close,
···
 	.break_ctl =		keyspan_pda_break_ctl,
 	.tiocmget =		keyspan_pda_tiocmget,
 	.tiocmset =		keyspan_pda_tiocmset,
-	.attach =		keyspan_pda_attach,
 	.port_probe =		keyspan_pda_port_probe,
 	.port_remove =		keyspan_pda_port_remove,
 };