regulator: Return actual error in of_regulator_bulk_get_all()

If regulator_get() in of_regulator_bulk_get_all() returns an error, that
error gets overridden and -EINVAL is always passed out. This masks probe
deferral requests and likely won't work properly in all cases.

Fix this by letting of_regulator_bulk_get_all() return the original
error code.

Fixes: 27b9ecc7 ("regulator: Add of_regulator_bulk_get_all")
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Link: https://patch.msgid.link/20240822072047.3097740-3-wenst@chromium.orgSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/of_regulator.c

@@ -777,7 +777,7 @@ int of_regulator_bulk_get_all(struct device *dev, struct device_node *np,
 			name[i] = '\0';
 			tmp = regulator_get(dev, name);
 			if (IS_ERR(tmp)) {
-				ret = -EINVAL;
+				ret = PTR_ERR(tmp);
 				goto error;
 			}
 			(*consumers)[n].consumer = tmp;