[PATCH] sr_ioctl fix

sr_ioctl.c uses virt_to_phys, which is defined in asm/io.h.
On x86, this accidentally works, due to other indirect includes,
but on Alpha results in a link error.

drivers/scsi/sr_ioctl.c

@@ -8,6 +8,7 @@
 #include <linux/blk.h>
 #include <linux/blkpg.h>
 #include <linux/cdrom.h>
+#include <asm/io.h>
 
 #include "scsi.h"
 #include "hosts.h"