staging: r8188eu: simplify the code to prevent link blinking restart

The blinking code to signal that a link is up has the same big if clause
around it as most other blink events.

Revert this if condition and exit if we're already blinking to show that
the link is up.

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/20220911145122.15444-8-martin@kaiser.cx


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