code refactoring for Vivado compatibility

hw/rtl/interfaces/VX_perf_cache_if.sv

@@ -0,0 +1,41 @@
+`ifndef VX_PERF_CACHE_IF
+`define VX_PERF_CACHE_IF
+
+`include "VX_define.vh"
+
+interface VX_perf_cache_if ();
+
+    wire [`PERF_CTR_BITS-1:0] reads;
+    wire [`PERF_CTR_BITS-1:0] writes;
+    wire [`PERF_CTR_BITS-1:0] read_misses;
+    wire [`PERF_CTR_BITS-1:0] write_misses;
+    wire [`PERF_CTR_BITS-1:0] bank_stalls;
+    wire [`PERF_CTR_BITS-1:0] mshr_stalls;
+    wire [`PERF_CTR_BITS-1:0] pipe_stalls;
+    wire [`PERF_CTR_BITS-1:0] crsp_stalls;
+
+    modport master (
+        output reads,
+        output writes,
+        output read_misses,
+        output write_misses,
+        output bank_stalls,
+        output mshr_stalls,
+        output pipe_stalls,
+        output crsp_stalls
+    );
+
+    modport slave (
+        input reads,
+        input writes,
+        input read_misses,
+        input write_misses,
+        input bank_stalls,
+        input mshr_stalls,
+        input pipe_stalls,
+        input crsp_stalls
+    );
+
+endinterface
+
+`endif