RLCMAC_Templates: Add functions to convert HeaderType<->MCS<->CPS

They will be used by tests, templates and RLCMAC_EncDec.cc itself.

MCS HEader Type 1 and 2 to CPS conversion lefts as a TODO with
placeholder functions to easily implement when needed.

Change-Id: I18ff55a8067165bf081bf21473b4f88af955bf5b
diff --git a/library/RLCMAC_Types.ttcn b/library/RLCMAC_Types.ttcn
index 27c1805..96b8a64 100644
--- a/library/RLCMAC_Types.ttcn
+++ b/library/RLCMAC_Types.ttcn
@@ -55,6 +55,7 @@
 		//MCS5_7, ?
 		// MCS6_9 ?
 	};
+	type record of CodingScheme CodingSchemeArray;
 
 	/* Partof DL RLC data block and DL RLC/MAC ctrl block */
 	type record DlMacHeader {