mfd: palmas: Use devm_of_platform_populate()

Use devm_of_platform_populate() to be sure that of_platform_depopulate
is called when removing the driver.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
diff --git a/drivers/mfd/palmas.c b/drivers/mfd/palmas.c
index 9103aff..3922a93 100644
--- a/drivers/mfd/palmas.c
+++ b/drivers/mfd/palmas.c
@@ -676,7 +676,7 @@
 	 * otherwise continue and add devices using mfd helpers.
 	 */
 	if (node) {
-		ret = of_platform_populate(node, NULL, NULL, &i2c->dev);
+		ret = devm_of_platform_populate(&i2c->dev);
 		if (ret < 0) {
 			goto err_irq;
 		} else if (pdata->pm_off && !pm_power_off) {