commit edac8943 upstream.

snd-aloop driver has no proper PM implementation, thus the PM resume
may trigger Oops due to leftover timer instance.  This patch adds the
missing suspend/resume implementation.
Reported-and-tested-by: El boulangero <elboulangero@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>