fpga: lib: simplify timing in pulse stretch

Original-commit: 2a3520b068456f1fdd291d4f8b0165e435a21757

lib/control/pulse_stretch.v

@@ -66,10 +66,9 @@ module pulse_stretch #(
       end
 
       1'b1: begin
+        count <= count + 1'b1;
         if (count == SCALE)
           state <= 1'b0;
-        else
-          count <= count + 1'b1;
       end
       endcase
     end