leds: spi-byte: Utilise temporary variable for struct device

We have a temporary variable to keep a pointer to struct device.
Utilise it where it makes sense.

Signed-off-by: Andy Shevchenko <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Lee Jones <[e-mail]>

drivers/leds/leds-spi-byte.c

···
 	init_data.devicename = "leds-spi-byte";
 	init_data.default_label = ":";
 
-	ret = devm_led_classdev_register_ext(&spi->dev, &led->ldev, &init_data);
+	ret = devm_led_classdev_register_ext(dev, &led->ldev, &init_data);
 	if (ret) {
 		mutex_destroy(&led->mutex);
 		return ret;