regulator: ti-abb: skip optional parameter for ldo-address

On platforms like OMAP4460, LDO override is never used. Even though
efuse determines the ABB bias mode to operate at, ABB voltage is
preconfigured in internal efuse registers without the need for
LDO override for bias voltage. So skip optional parameter if
property is not present.
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

drivers/regulator/ti-abb-regulator.c

@@ -765,6 +765,11 @@ static int ti_abb_probe(struct platform_device *pdev)
 
 	pname = "ldo-address";
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, pname);
+	if (!res) {
+		dev_dbg(dev, "Missing '%s' IO resource\n", pname);
+		ret = -ENODEV;
+		goto skip_opt;
+	}
 	abb->ldo_base = devm_ioremap_resource(dev, res);
 	if (IS_ERR(abb->ldo_base)) {
 		ret = PTR_ERR(abb->ldo_base);