iio: temperature: mlx90632: Add error handling for devm_pm_runtime_enable()

This call can fail so handling is necessary even if it is very unlikely.
Reported-by: coverity-bot <keescook+coverity-bot@chromium.org>
Addresses-Coverity-ID: 1527134 ("Error handling issues")
Fixes: 2aebc223 ("iio: temperature: mlx90632 Add runtime powermanagement modes")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-off-by: Crt Mori <cmo@melexis.com>
Link: https://lore.kernel.org/r/20221105125108.383193-2-jic23@kernel.org

drivers/iio/temperature/mlx90632.c

@@ -1267,7 +1267,10 @@ static int mlx90632_probe(struct i2c_client *client,
 	pm_runtime_get_noresume(&client->dev);
 	pm_runtime_set_active(&client->dev);
 
-	devm_pm_runtime_enable(&client->dev);
+	ret = devm_pm_runtime_enable(&client->dev);
+	if (ret)
+		return ret;
+
 	pm_runtime_set_autosuspend_delay(&client->dev, MLX90632_SLEEP_DELAY_MS);
 	pm_runtime_use_autosuspend(&client->dev);
 	pm_runtime_put_autosuspend(&client->dev);