libhns: The content of the header file should be protected with #define

[ Upstream commit cdde135 ]

Header files should be protected with #define to prevent repeated
inclusion.

Signed-off-by: Xinhao Liu <liuxinhao5@hisilicon.com>
Signed-off-by: Wenpeng Liang <liangwenpeng@huawei.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Nicolas Morey-Chaisemartin <nmoreychaisemartin@suse.com>

providers/hns/hns_roce_u_db.h

@@ -30,13 +30,13 @@
  * SOFTWARE.
  */
 
+#ifndef _HNS_ROCE_U_DB_H
+#define _HNS_ROCE_U_DB_H
+
 #include <linux/types.h>
 
 #include "hns_roce_u.h"
 
-#ifndef _HNS_ROCE_U_DB_H
-#define _HNS_ROCE_U_DB_H
-
 #if __BYTE_ORDER == __LITTLE_ENDIAN
 #define HNS_ROCE_PAIR_TO_64(val) ((uint64_t) val[1] << 32 | val[0])
 #elif __BYTE_ORDER == __BIG_ENDIAN