staging: speakup: remove jiffies comparison using time_after_eq()

This patch fixes checkpatch.pl warning in files of speakup
WARNING : Comparing jiffies is almost always wrong; prefer time_after,
time_before and friends

Signed-off-by: Tapasweni Pathak <tapaswenipathak@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>