staging: speakup: fix speakup-r regression

[ Upstream commit b1d562acc78f0af46de0dfe447410bc40bdb7ece ]

Here is a patch to make speakup-r work again.

It broke in 3.6 due to commit 4369c64c
"Input: Send events one packet at a time)

The problem was that the fakekey.c routine to fake a down arrow no
longer functioned properly and putting the input_sync fixed it.

Fixes: 4369c64c
Cc: stable <stable@vger.kernel.org>
Acked-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: John Covici <covici@ccs.covici.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>