leds: turris-omnia: Use uppercase first letter in all comments

Change first letter of 4 more comments to uppercase to make the driver
comments uniform.

Signed-off-by: Marek Behún <kabel@kernel.org>
Link: https://lore.kernel.org/r/20241111100355.6978-12-kabel@kernel.org


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