leds: is31fl32xx: Improve error reporting in .remove()

Returning an error value in an i2c remove callback results in a generic
error message being emitted by the i2c core, but otherwise it doesn't make
a difference. The device goes away anyhow and the devm cleanups are
called.

So instead of triggering the generic i2c error message, emit a more helpful
message if a problem occurs and return 0 to suppress the generic message.

This patch is a preparation for making i2c remove callbacks return void.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Pavel Machek <pavel@ucw.cz>

drivers/leds/leds-is31fl32xx.c

@@ -460,8 +460,14 @@ static int is31fl32xx_probe(struct i2c_client *client,
 static int is31fl32xx_remove(struct i2c_client *client)
 {
 	struct is31fl32xx_priv *priv = i2c_get_clientdata(client);
+	int ret;
 
-	return is31fl32xx_reset_regs(priv);
+	ret = is31fl32xx_reset_regs(priv);
+	if (ret)
+		dev_err(&client->dev, "Failed to reset registers on removal (%pe)\n",
+			ERR_PTR(ret));
+
+	return 0;
 }
 
 /*