Merge branch 'master' of https://github.com/dh73/yosys_gowin into dh73-master

diff --cc techlibs/gowin/synth_gowin.cc
index c7983bade8cc0d51aec17471649fbb8096de4d3f,8d5fed231ad0d27fb7638379961874213254b956..ac3dbfb29f6be483e7cfcb9ea13c316cd6b75341
--- 1/techlibs/gowin/synth_gowin.cc
--- 2/techlibs/gowin/synth_gowin.cc
+++ b/techlibs/gowin/synth_gowin.cc
@@@ -74,6 -80,8 +80,8 @@@ struct SynthGowinPass : public ScriptPa
                retime = false;
                flatten = true;
                nobram = false;
 -                nodffe = false;
++              nodffe = false;
+               nodram = false;
        }
  
        void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE