hwmon: (ina3221) return prober error code

ret is set to 0 which do not indicate an error.
Return -EINVAL instead.

Fixes: a9e9dd9c ("hwmon: (ina3221) Read channel input source info from DT")
Signed-off-by: NMarcus Folkesson <marcus.folkesson@gmail.com>
Link: https://lore.kernel.org/r/20230310075035.246083-1-marcus.folkesson@gmail.comSigned-off-by: NGuenter Roeck <linux@roeck-us.net>

drivers/hwmon/ina3221.c

@@ -772,7 +772,7 @@ static int ina3221_probe_child_from_dt(struct device *dev,
 		return ret;
 	} else if (val > INA3221_CHANNEL3) {
 		dev_err(dev, "invalid reg %d of %pOFn\n", val, child);
-		return ret;
+		return -EINVAL;
 	}
 
 	input = &ina->inputs[val];