net: replace uses of __constant_{endian}

Base versions handle constant folding now.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/decnet/dn_route.c b/net/decnet/dn_route.c
index c754670..5130dee 100644
--- a/net/decnet/dn_route.c
+++ b/net/decnet/dn_route.c
@@ -124,7 +124,7 @@
 
 static struct dst_ops dn_dst_ops = {
 	.family =		PF_DECnet,
-	.protocol =		__constant_htons(ETH_P_DNA_RT),
+	.protocol =		cpu_to_be16(ETH_P_DNA_RT),
 	.gc_thresh =		128,
 	.gc =			dn_dst_gc,
 	.check =		dn_dst_check,