extract_rdff: Add initvals parameter.

This is not used yet, but will be needed when read port reset/initial
value support lands.

kernel/mem.cc

@@ -445,7 +445,7 @@ std::vector<Mem> Mem::get_selected_memories(Module *module) {
 	return res;
 }
 
-Cell *Mem::extract_rdff(int idx) {
+Cell *Mem::extract_rdff(int idx, FfInitVals *initvals) {
 	MemRd &port = rd_ports[idx];
 
 	if (!port.clk_enable)

kernel/mem.h

@@ -21,6 +21,7 @@
 #define MEM_H
 
 #include "kernel/yosys.h"
+#include "kernel/ffinit.h"
 
 YOSYS_NAMESPACE_BEGIN
 
@@ -70,7 +71,7 @@ struct Mem {
 	Const get_init_data() const;
 	static std::vector<Mem> get_all_memories(Module *module);
 	static std::vector<Mem> get_selected_memories(Module *module);
-	Cell *extract_rdff(int idx);
+	Cell *extract_rdff(int idx, FfInitVals *initvals);
 	Mem(Module *module, IdString memid, int width, int start_offset, int size) : module(module), memid(memid), packed(false), mem(nullptr), cell(nullptr), width(width), start_offset(start_offset), size(size) {}
 };