ALSA: cs46xx - Fix suspend/resume with new DSP

Fix the basic suspend/resume of snd-cs46xx drivers with new DSP.

References:
	https://bugzilla.redhat.com/show_bug.cgi?id=498287
	https://bugzilla.redhat.com/show_bug.cgi?id=160751



Tested-by: Florian Zumbiehl <florz@florz.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>