6lowpan: add nhc module for GHC fragmentation extension header detection

Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Stefan Schmidt <stefan@osg.samsung.com>
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/net/6lowpan/Kconfig b/net/6lowpan/Kconfig
index e5184e6..13abcc5 100644
--- a/net/6lowpan/Kconfig
+++ b/net/6lowpan/Kconfig
@@ -81,4 +81,10 @@
 	  6LoWPAN IPv6 destination option generic header compression according
 	  to RFC7400.
 
+config 6LOWPAN_GHC_EXT_HDR_FRAG
+	tristate "GHC Fragmentation Options Header Support"
+	---help---
+	  6LoWPAN IPv6 fragmentation option generic header compression
+	  according to RFC7400.
+
 endif