haswell: re-add mrc.bin in separate board configs

libre mrc on haswell is quite buggy for now, but works in
a limited fashion

this patch re-adds the old configs, but as _mrc for example
t440p_12mb_mrc instead of t440p_12mb

and t440p_12mb (without _mrc) still uses the libre mrc code

resources/scripts/blobs/download

@@ -19,6 +19,9 @@ Download_needed(){
 			*ME*)
 				Extract_me || _failed="${_failed} me"
 				;;
+			*MRC*)
+				./download mrc || _failed="${_failed} mrc"
+				;;
 	esac
 	done
 	
@@ -92,6 +95,11 @@ set -- "resources/coreboot/${board}/config/*"
 . ${1} 2>/dev/null
 . "resources/coreboot/${board}/board.cfg"
 
+if [ "${CONFIG_HAVE_MRC}" = "y" ]; then
+	printf 'haswell board detected, downloading mrc\n'
+	needs="${needs} MRC"
+fi
+
 if [ "${CONFIG_HAVE_IFD_BIN}" = "y" ]; then
 	printf 'board needs intel firmware descriptor\n'
 	needs="${needs} IFD"