staging: r8188eu: simplify the LED_CTL_POWER_OFF case

When a caller of rtw_led_control requests that the led be switched off,
we should cancel the blink worker and set all blinking state variables
to false. This does not depend on the current blinking state.

Tested-by: Michael Straube <straube.linux@gmail.com>
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220905200146.82259-2-martin@kaiser.cx


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