can: bittiming: can_validate_bitrate(): simplify bit rate checking

This patch simplifies the validation of the fixed bit rates. If a
supported bit rate is found, directly return 0.

If no valid bit rate is found return -EINVAL;

Link: https://lore.kernel.org/all/20220124215642.3474154-6-mkl@pengutronix.deSigned-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>

drivers/net/can/dev/bittiming.c

@@ -248,18 +248,14 @@ can_validate_bitrate(struct net_device *dev, struct can_bittiming *bt,
 		     const u32 *bitrate_const,
 		     const unsigned int bitrate_const_cnt)
 {
-	struct can_priv *priv = netdev_priv(dev);
 	unsigned int i;
 
 	for (i = 0; i < bitrate_const_cnt; i++) {
 		if (bt->bitrate == bitrate_const[i])
-			break;
+			return 0;
 	}
 
-	if (i >= priv->bitrate_const_cnt)
-		return -EINVAL;
-
-	return 0;
+	return -EINVAL;
 }
 
 int can_get_bittiming(struct net_device *dev, struct can_bittiming *bt,