mfd: da9063: Propagate errno when I2C mode fails

Don't hardocde EIO but use the obtained value.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Mark Jonas <mark.jonas@de.bosch.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/mfd/da9063-i2c.c

@@ -448,7 +448,7 @@ static int da9063_i2c_probe(struct i2c_client *i2c,
 					DA9063_TWOWIRE_TO);
 		if (ret < 0) {
 			dev_err(da9063->dev, "Failed to set Two-Wire Bus Mode.\n");
-			return -EIO;
+			return ret;
 		}
 	}