sctp: mark functions needed by testsuite as SCTP_STATIC

The lksctp project implemenents a regressions suite which needs
certain functions exported.  SCTP_STATIC is used to compile
the function as 'static' when not in the testsuite.

include/net/sctp/sctp.h

@@ -103,6 +103,14 @@
 #define SCTP_PROTOSW_FLAG INET_PROTOSW_PERMANENT
 #endif
 
+
+/* Certain internal static functions need to be exported when 
+ * compiled into the test frame.
+ */
+#ifndef SCTP_STATIC
+#define SCTP_STATIC static
+#endif
+
 /* 
  * Function declarations. 
  */