serial: sh-sci: fix condition test to set SCBRR

SCBRR == 0 is valid value (divide by 1).
Signed-off-by: NTakashi Yoshii <takashi.yoshii.zj@renesas.com>
Signed-off-by: NShinya Kuribayashi <shinya.kuribayashi.px@renesas.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/sh-sci.c

@@ -1854,7 +1854,7 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
 	dev_dbg(port->dev, "%s: SMR %x, t %x, SCSCR %x\n", __func__, smr_val, t,
 		s->cfg->scscr);
 
-	if (t > 0) {
+	if (t >= 0) {
 		if (t >= 256) {
 			serial_port_out(port, SCSMR, (serial_port_in(port, SCSMR) & ~3) | 1);
 			t >>= 2;