serial: uartps: Do not initialize field to zero again

Writing zero and NULLs to already initialized fields is not needed.
Remove this additional writes.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/xilinx_uartps.c

@@ -1503,15 +1503,12 @@ static int cdns_uart_probe(struct platform_device *pdev)
 
 	/* At this point, we've got an empty uart_port struct, initialize it */
 	spin_lock_init(&port->lock);
-	port->membase	= NULL;
-	port->irq	= 0;
 	port->type	= PORT_UNKNOWN;
 	port->iotype	= UPIO_MEM32;
 	port->flags	= UPF_BOOT_AUTOCONF;
 	port->ops	= &cdns_uart_ops;
 	port->fifosize	= CDNS_UART_FIFO_SIZE;
 	port->line	= id;
-	port->dev	= NULL;
 
 	/*
 	 * Register the port.