sctp: add feature bit for SCTP offload in hardware

this is the sctp code to enable hardware crc32c offload for
adapters that support it.

Originally by: Vlad Yasevich <vladislav.yasevich@hp.com>

modified by Jesse Brandeburg <jesse.brandeburg@intel.com>

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index fe20d17..f8c3619 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -670,7 +670,9 @@
 #define NETIF_F_GRO		16384	/* Generic receive offload */
 #define NETIF_F_LRO		32768	/* large receive offload */
 
+/* the GSO_MASK reserves bits 16 through 23 */
 #define NETIF_F_FCOE_CRC	(1 << 24) /* FCoE CRC32 */
+#define NETIF_F_SCTP_CSUM	(1 << 25) /* SCTP checksum offload */
 
 	/* Segmentation offload features */
 #define NETIF_F_GSO_SHIFT	16