Only support RTL archictecture. No need to port Megawizard arch...

Only support RTL archictecture. No need to port Megawizard arch dsp_mult_add2,4.vhd from /home/kooistra/svnroot/UniBoard_FP7/UniBoard/trunk.

libraries/base/common_mult/src/vhdl/common_mult_add2.vhd

@@ -37,9 +37,7 @@ USE technology_lib.technology_select_pkg.ALL;
 --
 -- Architectures:
 -- . rtl      : uses RTL to have all registers in one clocked process
--- . stratix4 : uses MegaWizard component dsp_mult_add2.vhd
 --
--- Preferred architecture: 'stratix4', see synth\quartus\common_top.vhd
 
 ENTITY common_mult_add2 IS
   GENERIC (

libraries/base/common_mult/src/vhdl/common_mult_add4.vhd

@@ -40,9 +40,7 @@ USE technology_lib.technology_select_pkg.ALL;
 --
 -- Architectures:
 -- . rtl      : uses RTL to have all registers in one clocked process
--- . stratix4 : uses MegaWizard component dsp_mult_add4.vhd
 --
--- Preferred architecture: 'rtl', see synth\quartus\common_top.vhd
 
 ENTITY common_mult_add4 IS
   GENERIC (