regulator: max14577: Fix invalid return value on DT parse success

This fixes bug introduced in 667a6b7a (regulator: max14577: Add missing
of_node_put). The DTS parsing function returned number of matched
regulators as success status which then was compared against 0 in probe.

Result was a probe fail after successful parsing the DTS:
max14577-regulator: probe of max14577-regulator failed with error 2
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviwed-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>

drivers/regulator/max14577.c

@@ -166,9 +166,10 @@ static int max14577_regulator_dt_parse_pdata(struct platform_device *pdev)
 
 	ret = of_regulator_match(&pdev->dev, np, max14577_regulator_matches,
 			MAX14577_REG_MAX);
-	if (ret < 0) {
+	if (ret < 0)
 		dev_err(&pdev->dev, "Error parsing regulator init data: %d\n", ret);
-	}
+	else
+		ret = 0;
 
 	of_node_put(np);