serial: 8250: Fix rs485 delay after console write

Due to a silly copy-paste mistake, commit 7f980307 ("serial: 8250:
Support console on software emulated rs485 ports") erroneously pauses
for the duration of delay_rts_before_send after writing to the console,
instead of delay_rts_after_send.  Mea culpa.

Fixes: 7f980307 ("serial: 8250: Support console on software emulated rs485 ports")
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Link: https://lore.kernel.org/r/9dd67f33c90d23f7fafa3b81b1e812ddabf9ca24.1585319447.git.lukas@wunner.deSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/8250/8250_port.c

@@ -3271,7 +3271,7 @@ void serial8250_console_write(struct uart_8250_port *up, const char *s,
 	serial_port_out(port, UART_IER, ier);
 
 	if (em485) {
-		mdelay(port->rs485.delay_rts_before_send);
+		mdelay(port->rs485.delay_rts_after_send);
 		if (em485->tx_stopped)
 			up->rs485_stop_tx(up);
 	}