code refactoring for Vivado compatibility

hw/rtl/interfaces/VX_fetch_to_csr_if.sv

@@ -0,0 +1,20 @@
+`ifndef VX_FETCH_TO_CSR_IF
+`define VX_FETCH_TO_CSR_IF
+
+`include "VX_define.vh"
+
+interface VX_fetch_to_csr_if ();
+
+    wire [`NUM_WARPS-1:0][`NUM_THREADS-1:0] thread_masks;
+
+    modport master (
+        output thread_masks
+    );
+
+    modport slave (
+        input  thread_masks
+    );
+
+endinterface
+
+`endif