net: replace __constant_{endian} uses in net headers

Base versions handle constant folding now.  For headers exposed to
userspace, we must only expose the __ prefixed versions.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 936e333..c179318 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -388,7 +388,7 @@
 	IB_MULTICAST_QPN = 0xffffff
 };
 
-#define IB_LID_PERMISSIVE	__constant_htons(0xFFFF)
+#define IB_LID_PERMISSIVE	cpu_to_be16(0xFFFF)
 
 enum ib_ah_flags {
 	IB_AH_GRH	= 1