minor update - mux reordering to reduce critical path on input data

hw/rtl/libs/VX_skid_buffer.v

@@ -81,9 +81,11 @@ module VX_skid_buffer #(
             always @(posedge clk) begin
                 if (push) begin
                     buffer <= data_in;
-                end
-                if (pop) begin
-                    data_out_r <= use_buffer ? buffer : data_in;
+                end                
+                if (pop && !use_buffer) begin
+                    data_out_r <= data_in;                    
+                end else if (pop) begin
+                    data_out_r <= buffer;
                 end
             end