sctp: move global declaration to header file.

sctp_chunk_cachep & sctp_bucket_cachep is used module global, so move it
to a header file.

Signed-off-by: Sebastian Siewior <sebastian@breakpoint.cc>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h
index 16baef4..d529045 100644
--- a/include/net/sctp/sctp.h
+++ b/include/net/sctp/sctp.h
@@ -190,6 +190,16 @@
 
 
 /*
+ * Module global variables
+ */
+
+ /*
+  * sctp/protocol.c
+  */
+extern struct kmem_cache *sctp_chunk_cachep __read_mostly;
+extern struct kmem_cache *sctp_bucket_cachep __read_mostly;
+
+/*
  *  Section:  Macros, externs, and inlines
  */