regulator: lp8788-ldo: Let core handle GPIO descriptor

Use the gpiod_get() rather than the devm_* version so that the
regulator core can handle the lifecycle of these descriptors.

Fixes: 2468f0d5 ("regulator: lp8788-ldo: Pass descriptor instead of GPIO number")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/lp8788-ldo.c

@@ -501,8 +501,12 @@ static int lp8788_config_ldo_enable_mode(struct platform_device *pdev,
 		return 0;
 	}
 
-	/* FIXME: check default mode for GPIO here: high or low? */
-	ldo->ena_gpiod = devm_gpiod_get_index_optional(&pdev->dev,
+	/*
+	 * Do not use devm* here: the regulator core takes over the
+	 * lifecycle management of the GPIO descriptor.
+	 * FIXME: check default mode for GPIO here: high or low?
+	 */
+	ldo->ena_gpiod = gpiod_get_index_optional(&pdev->dev,
 					       "enable",
 					       enable_id,
 					       GPIOD_OUT_HIGH |