serial: bcm2835: add driver for bcm2835-aux-uart

[Martin Sperl]

On 08.02.2016 19:20, Dan Carpenter wrote:
> Hello Martin Sperl,
>
> The patch bdc5f3009580: "serial: bcm2835: add driver for
> bcm2835-aux-uart" from Jan 17, 2016, leads to the following static
> checker warning:
>
> 	drivers/tty/serial/8250/8250_bcm2835aux.c:63 bcm2835aux_serial_probe()
> 	warn: unsigned 'data->uart.port.irq' is never less than zero.

thanks - will fix that