code refactoring for Vivado compatibility

hw/rtl/interfaces/VX_gpr_req_if.sv

@@ -0,0 +1,29 @@
+`ifndef VX_GPR_REQ_IF
+`define VX_GPR_REQ_IF
+
+`include "VX_define.vh"
+
+interface VX_gpr_req_if ();  
+  
+    wire [`NW_BITS-1:0] wid;
+    wire [`NR_BITS-1:0] rs1;
+    wire [`NR_BITS-1:0] rs2;  
+    wire [`NR_BITS-1:0] rs3;
+
+    modport master (
+        output wid,    
+        output rs1,
+        output rs2,
+        output rs3
+    );
+
+    modport slave (
+        input wid,    
+        input rs1,
+        input rs2,
+        input rs3
+    );
+
+endinterface
+
+`endif