Input: do not emit unneeded EV_SYN when suspending

Do not emit EV_SYN/SYN_REPORT on suspend if there were no keys that are
still pressed as we are suspending the device (and in all other cases when
input core is forcibly releasing keys via input_dev_release_keys() call).

Change-Id: Ie0aa8b14e693ad8185d8cf44baa7b75a9a9b9aff
Reviewed-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Git-commit: 00159f19a5057cb779146afce1cceede692af346
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git


Signed-off-by: Matt Wagantall <mattw@codeaurora.org>