leds: pca9532: Assign gpio base dynamically

When using devicetree, gpio_base holds its initial zero value which can
lead to a rejection if another gpio controller already occupies this
base. To prevent that collision let the gpio base be assigned dynamically.
Signed-off-by: NStefan Riedmueller <s.riedmueller@phytec.de>
Signed-off-by: NPavel Machek <pavel@ucw.cz>

drivers/leds/leds-pca9532.c

@@ -480,6 +480,8 @@ pca9532_of_populate_pdata(struct device *dev, struct device_node *np)
 	if (!pdata)
 		return ERR_PTR(-ENOMEM);
 
+	pdata->gpio_base = -1;
+
 	of_property_read_u8_array(np, "nxp,pwm", &pdata->pwm[0],
 				  ARRAY_SIZE(pdata->pwm));
 	of_property_read_u8_array(np, "nxp,psc", &pdata->psc[0],