staging: r8188eu: cancel blink_work during wps stop

We can always cancel blink_work during wps_stop. The blinking pattern will
be updated to show that wps was successful. Another worker will be started
for this.

Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> # Edimax N150
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220918175700.215170-2-martin@kaiser.cx


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