staging: r8188eu: don't restart WPS blinking unnecessarily

Simplify one of the cases in rtw_led_control. If we're already blinking
during WPS, we don't have to restart this blinking when the caller
requests it again. We can simply return and keep on blinking.

Tested-by: Michael Straube <straube.linux@gmail.com>
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220905200146.82259-3-martin@kaiser.cx


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