ALSA: Include linux/io.h instead of asm/io.h

Nowadays it's recommended.  Replace all in a shot.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/cmipci.c b/sound/pci/cmipci.c
index 63d2c82..1d0f2ca 100644
--- a/sound/pci/cmipci.c
+++ b/sound/pci/cmipci.c
@@ -20,7 +20,7 @@
 /* Does not work. Warning may block system in capture mode */
 /* #define USE_VAR48KRATE */
 
-#include <asm/io.h>
+#include <linux/io.h>
 #include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <linux/init.h>