vortex tutorial assignment 5 solution

hw/rtl/interfaces/VX_lsu_req_if.sv

@@ -17,6 +17,7 @@ interface VX_lsu_req_if ();
     wire [`NR_BITS-1:0]             rd;
     wire                            wb;
     wire                            ready;
+    wire                            is_prefetch;
 
     modport master (
         output valid,
@@ -30,6 +31,7 @@ interface VX_lsu_req_if ();
         output offset,
         output rd,
         output wb,
+        output is_prefetch,
         input  ready
     );
 
@@ -45,6 +47,7 @@ interface VX_lsu_req_if ();
         input  offset,
         input  rd,
         input  wb,
+        input  is_prefetch,
         output ready
     );