i2c: rcar: (cosmetic) remove superfluous parenthesis

A recent patch added even more superfluous parenthesis to those, which
already were there. Remove them again.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

drivers/i2c/busses/i2c-rcar.c

@@ -306,7 +306,7 @@ static int rcar_i2c_clock_calculate(struct rcar_i2c_priv *priv,
 	/*
 	 * keep icccr value
 	 */
-	priv->icccr = (scgd << (cdf_width) | cdf);
+	priv->icccr = scgd << cdf_width | cdf;
 
 	return 0;
 }