Revert "RDMA/hns: fix build regression"

This reverts commit ecd840ff9b793ac60e3e6658414525535349a17b.

drivers/infiniband/hw/hns/hns_roce_device.h

@@ -33,7 +33,6 @@
 #ifndef _HNS_ROCE_DEVICE_H
 #define _HNS_ROCE_DEVICE_H
 
-#include <linux/io.h>
 #include <rdma/ib_verbs.h>
 
 #define DRV_NAME "hns_roce"