IB: Remove __constant_{endian} uses

The base versions handle constant folding just fine, use them
directly.  The replacements are OK in the include/ files as they are
not exported to userspace so we don't need the __ prefixed versions.

This patch does not affect code generation at all.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/hw/ehca/ehca_sqp.c

@@ -46,11 +46,11 @@
 #include "ehca_iverbs.h"
 #include "hcp_if.h"
 
-#define IB_MAD_STATUS_REDIRECT		__constant_htons(0x0002)
-#define IB_MAD_STATUS_UNSUP_VERSION	__constant_htons(0x0004)
-#define IB_MAD_STATUS_UNSUP_METHOD	__constant_htons(0x0008)
+#define IB_MAD_STATUS_REDIRECT		cpu_to_be16(0x0002)
+#define IB_MAD_STATUS_UNSUP_VERSION	cpu_to_be16(0x0004)
+#define IB_MAD_STATUS_UNSUP_METHOD	cpu_to_be16(0x0008)
 
-#define IB_PMA_CLASS_PORT_INFO		__constant_htons(0x0001)
+#define IB_PMA_CLASS_PORT_INFO		cpu_to_be16(0x0001)
 
 /**
  * ehca_define_sqp - Defines special queue pair 1 (GSI QP). When special queue