regulator: da9211: switch to using devm_fwnode_gpiod_get

devm_gpiod_get_from_of_node() is being retired in favor of
devm_fwnode_gpiod_get_index(), that behaves similar to
devm_gpiod_get_index(), but can work with arbitrary firmware node. It
will also be able to support secondary software nodes.

Let's switch this driver over.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Link: https://lore.kernel.org/r/20191004231017.130290-6-dmitry.torokhov@gmail.comReviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/da9211-regulator.c

@@ -283,12 +283,12 @@ static struct da9211_pdata *da9211_parse_regulators_dt(
 
 		pdata->init_data[n] = da9211_matches[i].init_data;
 		pdata->reg_node[n] = da9211_matches[i].of_node;
-		pdata->gpiod_ren[n] = devm_gpiod_get_from_of_node(dev,
-				  da9211_matches[i].of_node,
-				  "enable-gpios",
-				  0,
-				  GPIOD_OUT_HIGH | GPIOD_FLAGS_BIT_NONEXCLUSIVE,
-				  "da9211-enable");
+		pdata->gpiod_ren[n] = devm_fwnode_gpiod_get(dev,
+					of_fwnode_handle(pdata->reg_node[n]),
+					"enable",
+					GPIOD_OUT_HIGH |
+						GPIOD_FLAGS_BIT_NONEXCLUSIVE,
+					"da9211-enable");
 		if (IS_ERR(pdata->gpiod_ren[n]))
 			pdata->gpiod_ren[n] = NULL;
 		n++;