ALSA: ASoC: fix PM=n build

Fix sound/soc build failure when CONFIG_PM=n:

linux-next-20080617/sound/soc/soc-core.c:829: error: 'soc_resume_deferred' undeclared (first use in this function)
soc3.out:make[3]: *** [sound/soc/soc-core.o] Error 1
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

sound/soc/soc-core.c

@@ -825,8 +825,10 @@ static int soc_probe(struct platform_device *pdev)
 
 	/* DAPM stream work */
 	INIT_DELAYED_WORK(&socdev->delayed_work, close_delayed_work);
+#ifdef CONFIG_PM
 	/* deferred resume work */
 	INIT_WORK(&socdev->deferred_resume_work, soc_resume_deferred);
+#endif
 
 	return 0;