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/ymfpci/ymfpci_main.c b/sound/pci/ymfpci/ymfpci_main.c
index 227d5c9..4c26076 100644
--- a/sound/pci/ymfpci/ymfpci_main.c
+++ b/sound/pci/ymfpci/ymfpci_main.c
@@ -27,6 +27,7 @@
 #include <linux/slab.h>
 #include <linux/mutex.h>
 #include <linux/module.h>
+#include <linux/io.h>
 
 #include <sound/core.h>
 #include <sound/control.h>
@@ -36,7 +37,6 @@
 #include <sound/asoundef.h>
 #include <sound/mpu401.h>
 
-#include <asm/io.h>
 #include <asm/byteorder.h>
 
 /*