ALSA: ice17xx: Fix inclusion of linux/io.h

Include linux/io.h in ice1712.h since inb() and outb() are used in
inline functions there.  Remove the redundant inclusion of that file
in other places at the same time.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/ice1712/revo.c

@@ -21,7 +21,6 @@
  *
  */      
 
-#include <asm/io.h>
 #include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <linux/init.h>