USB: cypress_m8: unify confusing new baudrate check

The current code has a confusing duplicate new_baudrate init when setting
the serial parameters.  So just combine the if statement checks to avoid
this.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/serial/cypress_m8.c

@@ -352,12 +352,9 @@ static int cypress_serial_control(struct tty_struct *tty,
 
 	switch (cypress_request_type) {
 	case CYPRESS_SET_CONFIG:
-		new_baudrate = priv->baud_rate;
 		/* 0 means 'Hang up' so doesn't change the true bit rate */
-		if (baud_rate == 0)
 		new_baudrate = priv->baud_rate;
-		/* Change of speed ? */
-		else if (baud_rate != priv->baud_rate) {
+		if (baud_rate && baud_rate != priv->baud_rate) {
 			dbg("%s - baud rate is changing", __func__);
 			retval = analyze_baud_rate(port, baud_rate);
 			if (retval >= 0) {