drivers/console: Remove unnecessary indentation in uart_console_isr

Most of the uart_console_isr() function is heavily indented. We can
remove one level by converting:

	if (uart_irq_rx_ready(uart_console_dev)) {
		...
		...
	}

to:

	if (!uart_irq_rx_ready(uart_console_dev)) {
		continue;
	}

Change-Id: Ib2fe150490a8391de4001f29e4727431668853c4
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
1 file changed