Updating files to use the updated yosys. Also enabling yosys-plugins compilation

REsolving conflicts while rebasing to master

CMakeLists.txt

@@ -241,6 +241,7 @@ add_custom_target(
 # yosys compilation ends
 
 # yosys-plugins compilation starts
+# run makefile provided, we pass-on the options to the local make file 
 add_custom_target(
     yosys-plugins ALL 
     COMMAND $(MAKE) 
@@ -249,7 +250,7 @@ add_custom_target(
     COMMENT "Compile Yosys-plugins with given Makefile"
 )
 
-add_dependencies(yosys-plugins yosys) 
+add_dependencies(yosys-plugins yosys)
 
 # yosys-plugins compilation ends
 

openfpga_flow/misc/ys_tmpl_yosys_vpr_bram_flow.ys

@@ -65,6 +65,7 @@ opt_expr -mux_undef
 simplemap
 opt_expr
 opt_merge
+#opt_rmdff
 opt_clean
 opt
 dfflegalize -cell $_DFF_?_ 01 -cell $_DFF_?P?_ r -cell $_SDFF_?P?_ r