leds: leds-lp5569: Fix typo in driver name

Remove extra x from driver name as this was a typo from copy-paste
error.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Link: https://lore.kernel.org/r/20240712004556.15601-1-ansuelsmth@gmail.com


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