i2c: rcar: avoid non-standard use of goto

Kernel functions goto somewhere on error conditions. Using goto for the
default path is irritating. Let's bail out on error instead and use a
proper retval.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

Author: Wolfram Sang

drivers/i2c/busses/i2c-rcar.c

@@ -317,19 +317,23 @@ static int rcar_i2c_clock_calculate(struct rcar_i2c_priv *priv)
 	for (scgd = 0; scgd < 0x40; scgd++) {
 		scl = ick / (20 + (scgd * 8) + round);
 		if (scl <= t.bus_freq_hz)
-			goto scgd_find;
+			break;
 	}
-	dev_err(dev, "it is impossible to calculate best SCL\n");
-	return -EIO;
 
-scgd_find:
+	if (scgd == 0x40)
+		goto err_no_val;
+
 	dev_dbg(dev, "clk %d/%d(%lu), round %u, CDF:0x%x, SCGD: 0x%x\n",
 		scl, t.bus_freq_hz, rate, round, cdf, scgd);
 
 	/* keep icccr value */
 	priv->icccr = scgd << cdf_width | cdf;
 
 	return 0;
+
+err_no_val:
+	dev_err(dev, "it is impossible to calculate best SCL\n");
+	return -EINVAL;
 }
 
 /*