staging: r8188eu: remove unused parameter from update_TSF()

The parameter 'len' of update_TSF() is unused. Remove it.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20220715062908.8547-4-straube.linux@gmail.com


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