This patch reverts https://github.com/torvalds/linux/commit/aea6cb99703e17019e025aa71643b4d3e0a24413
that got backported into both 5.8.17 and 5.9.2

Without it rk808 used by all rk3399 boards fails to be probed.

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 4859cf84c..b6dcbb779 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -5256,20 +5256,15 @@ regulator_register(const struct regulator_desc *regulator_desc,
 	else if (regulator_desc->supply_name)
 		rdev->supply_name = regulator_desc->supply_name;
 
+	/*
+	 * Attempt to resolve the regulator supply, if specified,
+	 * but don't return an error if we fail because we will try
+	 * to resolve it again later as more regulators are added.
+	 */
+	if (regulator_resolve_supply(rdev))
+		rdev_dbg(rdev, "unable to resolve supply\n");
+
 	ret = set_machine_constraints(rdev, constraints);
-	if (ret == -EPROBE_DEFER) {
-		/* Regulator might be in bypass mode and so needs its supply
-		 * to set the constraints */
-		/* FIXME: this currently triggers a chicken-and-egg problem
-		 * when creating -SUPPLY symlink in sysfs to a regulator
-		 * that is just being created */
-		ret = regulator_resolve_supply(rdev);
-		if (!ret)
-			ret = set_machine_constraints(rdev, constraints);
-		else
-			rdev_dbg(rdev, "unable to resolve supply early: %pe\n",
-				 ERR_PTR(ret));
-	}
 	if (ret < 0)
 		goto wash;