staging: r8188eu: always cancel blink_work when WPS failed

Cancel blink_work if WPS fails. Another worker will be scheduled after
the state variables are updated.

Tested-by: Michael Straube <straube.linux@gmail.com>
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220905200146.82259-6-martin@kaiser.cx


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