drivers: base: Print error code on synthetic uevent failure

If we're going to log the failure, we might as well log the return code
too.
Signed-off-by: Brian Norris <briannorris@chromium.org>
Link: https://lore.kernel.org/r/20220824165213.1.Ifdb98af3d0c23708a11d8d5ae5697bdb7e96a3cc@changeidSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/base/core.c

@@ -2509,7 +2509,7 @@ static ssize_t uevent_store(struct device *dev, struct device_attribute *attr,
 	rc = kobject_synth_uevent(&dev->kobj, buf, count);
 
 	if (rc) {
-		dev_err(dev, "uevent: failed to send synthetic uevent\n");
+		dev_err(dev, "uevent: failed to send synthetic uevent: %d\n", rc);
 		return rc;
 	}