[PATCH] Use linux/io.h instead of asm/io.h

In preparation for moving check_signature, change these users from asm/io.h
to linux/io.h

Signed-off-by: Matthew Wilcox <willy@parisc-linux.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/block/xd.c b/drivers/block/xd.c
index 10cc387..0d97b7e 100644
--- a/drivers/block/xd.c
+++ b/drivers/block/xd.c
@@ -48,9 +48,9 @@
 #include <linux/blkdev.h>
 #include <linux/blkpg.h>
 #include <linux/delay.h>
+#include <linux/io.h>
 
 #include <asm/system.h>
-#include <asm/io.h>
 #include <asm/uaccess.h>
 #include <asm/dma.h>