[SCSI] qla4xxx: fix build on PPC

We use read/write[bslq] but do not include linux/io.h. This causes
build failures on PPC. Include that file.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Stable Tree <stable@kernel.org>
Acked-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

drivers/scsi/qla4xxx/ql4_nx.c

@@ -5,6 +5,7 @@
  * See LICENSE.qla4xxx for copyright and licensing details.
  */
 #include <linux/delay.h>
+#include <linux/io.h>
 #include <linux/pci.h>
 #include "ql4_def.h"
 #include "ql4_glbl.h"