power: regulator: support off-on-delay-us

off-on-delay-us has been supported by Linux, so let's use it.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/drivers/power/regulator/regulator_common.c b/drivers/power/regulator/regulator_common.c
index 2041086..939efb2 100644
--- a/drivers/power/regulator/regulator_common.c
+++ b/drivers/power/regulator/regulator_common.c
@@ -37,7 +37,11 @@
 	dev_pdata->startup_delay_us = dev_read_u32_default(dev,
 							"startup-delay-us", 0);
 	dev_pdata->off_on_delay_us =
+		dev_read_u32_default(dev, "off-on-delay-us", 0);
+	if (!dev_pdata->off_on_delay_us) {
+		dev_pdata->off_on_delay_us =
 			dev_read_u32_default(dev, "u-boot,off-on-delay-us", 0);
+	}
 
 	return 0;
 }