[PATCH] net/farsync: add set_current_state() before schedule_timeout()

Insert set_current_state() before schedule_timeout() so the
function delays as expected. Without the addition, schedule_timeout()
will return immediately.

Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Maximilian Attems <janitor@sternwelten.at>
Signed-off-by: Domen Puncer <domen@coderock.org>