staging: speakup: fix speakup-r regression

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

It broke in 3.6 due to commit 4369c64c79a22b98d3b7eff9d089196cd878a10a
"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: 4369c64c79a22b98d3b7eff9d089196cd878a10a
Cc: stable <[e-mail]>
Acked-by: Samuel Thibault <[e-mail]>
Signed-off-by: John Covici <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/speakup/fakekey.c

···
 	__this_cpu_write(reporting_keystroke, true);
 	input_report_key(virt_keyboard, KEY_DOWN, PRESSED);
 	input_report_key(virt_keyboard, KEY_DOWN, RELEASED);
+	input_sync(virt_keyboard);
 	__this_cpu_write(reporting_keystroke, false);
 
 	/* reenable preemption */