staging: r8188eu: remove LedPin from struct struct LED_871x

We only support a single LED. LedPin in struct struct LED_871x is
always LED_PIN_LED0. There's no need to store this info or to pass it
to functions as a parameter.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20211207210537.23382-4-martin@kaiser.cx


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>