serial: altera: remove unnecessary platform_set_drvdata()

The driver core clears the driver data to NULL after device_release
or on probe failure, since commit 0998d0631001288a5974afc0b2a5f568bcdecb4d
(device-core: Ensure drvdata = NULL when no driver is bound).
Thus, it is not needed to manually clear the device driver data to NULL.

Signed-off-by: Jingoo Han <[e-mail]>
Acked-by: Tobias Klauser <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/tty/serial/altera_uart.c

···
 
 	if (port) {
 		uart_remove_one_port(&altera_uart_driver, port);
-		platform_set_drvdata(pdev, NULL);
 		port->mapbase = 0;
 	}