Added mem library

libraries/io/ddr3/src/vhdl/ddr3.vhd

@@ -24,6 +24,7 @@ LIBRARY IEEE, common_lib, dp_lib;
 USE IEEE.STD_LOGIC_1164.ALL;
 USE IEEE.NUMERIC_STD.ALL;
 USE common_lib.common_pkg.ALL; 
+USE common_lib.common_mem_pkg.ALL;
 USE work.ddr3_pkg.ALL;
 USE dp_lib.dp_stream_pkg.ALL;