smc_diag.h: fix include from userland

This patch prepares the uapi export by fixing the following error:

.../linux/smc_diag.h:6:27: fatal error: rdma/ib_verbs.h: No such file or directory
 #include <rdma/ib_verbs.h>
Signed-off-by: NNicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>

include/rdma/ib_verbs.h

@@ -62,6 +62,7 @@
 #include <linux/mmu_notifier.h>
 #include <linux/uaccess.h>
 #include <linux/cgroup_rdma.h>
+#include <uapi/rdma/ib_user_verbs.h>
 
 extern struct workqueue_struct *ib_wq;
 extern struct workqueue_struct *ib_comp_wq;
@@ -1889,8 +1890,6 @@ enum ib_mad_result {
 	IB_MAD_RESULT_CONSUMED = 1 << 2  /* Packet consumed: stop processing */
 };
 
-#define IB_DEVICE_NAME_MAX 64
-
 struct ib_port_cache {
 	struct ib_pkey_cache  *pkey;
 	struct ib_gid_table   *gid;

include/uapi/linux/smc_diag.h

@@ -3,7 +3,7 @@
 
 #include <linux/types.h>
 #include <linux/inet_diag.h>
-#include <rdma/ib_verbs.h>
+#include <rdma/ib_user_verbs.h>
 
 /* Request structure */
 struct smc_diag_req {

include/uapi/rdma/ib_user_verbs.h

@@ -1135,4 +1135,6 @@ struct ib_uverbs_ex_destroy_rwq_ind_table  {
 	__u32 ind_tbl_handle;
 };
 
+#define IB_DEVICE_NAME_MAX 64
+
 #endif /* IB_USER_VERBS_H */