Added qerv files

rtl/core/mcu.v

@@ -72,6 +72,9 @@ module mcu #(
     assign GPI[32*3-1:32*2] = i_GPI_C;
     assign GPI[32*4-1:32*3] = i_GPI_D;
 
+    assign wb_ext_ack = wb_ext_gpio_ack;
+    assign wb_ext_rdt = wb_ext_gpio_rdt;
+
     // SERV core with mux splitting dbus into mem and ext and
     //  arbiter combining mem and ibus
     //  separate rst line to let other hardware keep core under reset