leds: tca6507: Use devm_led_classdev_register() to simplify remove path

Use devm version of LED classdev register add function to handle removal.

Signed-off-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20231116224121.302150-2-afd@ti.com


Signed-off-by: Lee Jones <lee@kernel.org>