[ALSA] Clean up duplicate includes in sound/ppc/

This patch cleans up duplicate includes in
	sound/ppc/
Signed-off-by: NJesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NJaroslav Kysela <perex@suse.cz>

sound/ppc/snd_ps3.c

@@ -33,7 +33,6 @@
 #include <linux/dmapool.h>
 #include <linux/dma-mapping.h>
 #include <asm/firmware.h>
-#include <linux/io.h>
 #include <asm/dma.h>
 #include <asm/lv1call.h>
 #include <asm/ps3.h>