Remove verilated vpi code, add missing includes for C++

Vortex rtlsim defines sim_trace_enabled... functions in the Verilated
C++ code for use in dpi_trace, which we don't need.

hw/dpi/float_dpi.cpp

@@ -20,7 +20,7 @@
 #include <rvfloats.h>
 #include <util.h>
 #include "svdpi.h"
-#include "verilated_vpi.h"
+// #include "verilated_vpi.h"
 #include "VX_config.h"
 
 extern "C" {
@@ -337,4 +337,4 @@ void dpi_fmax(bool enable, int dst_fmt, int64_t a, int64_t b, int64_t* result, s
   } else {
     *result = nan_box(rv_fmax_s(check_boxing(a), check_boxing(b), fflags));
   }
-}
+}

hw/dpi/util_dpi.cpp

@@ -12,14 +12,16 @@
 // limitations under the License.
 
 #include <stdio.h>
+#include <stdarg.h>
 #include <math.h>
 #include <unordered_map>
 #include <vector>
 #include <mutex>
+#include <memory>
 #include <iostream>
 
 #include "svdpi.h"
-#include "verilated_vpi.h"
+// #include "verilated_vpi.h"
 
 #include "uuid_gen.h"
 
@@ -191,8 +193,8 @@ void dpi_idiv(bool enable, bool is_signed, iword_t a, iword_t b, iword_t* quotie
 void dpi_trace(int level, const char* format, ...) { 
   if (level > DEBUG_LEVEL)
     return;
-  if (!sim_trace_enabled())
-    return;
+  // if (!sim_trace_enabled())
+  //   return;
   va_list va;
 	va_start(va, format);  
 	vprintf(format, va);
@@ -200,11 +202,11 @@ void dpi_trace(int level, const char* format, ...) {
 }
 
 void dpi_trace_start() { 
-  sim_trace_enable(true);
+  // sim_trace_enable(true);
 }
 
 void dpi_trace_stop() { 
-  sim_trace_enable(false);
+  // sim_trace_enable(false);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -229,4 +231,4 @@ uint64_t dpi_uuid_gen(bool reset, int wid, uint64_t PC) {
   uint32_t instr_ref = instr_uuid >> 16;
   uint64_t uuid = (uint64_t(instr_ref) << 32) | (wid << 16) | instr_id;
   return uuid;
-}
+}