Increase number of FE modules to 4

Update top/fe-link-histogram/firmware/hdl/link_maps.vhd, top/fe-link-histogram/firmware/hdl/emp_payload.vhd files

top/fe-link-histogram/firmware/hdl/emp_payload.vhd

@@ -139,7 +139,7 @@ port map(
 
 
 --==============================--
-genGBTExtractor: for i in 0 downto cNumberOfFEModules - 1 generate
+genGBTExtractor: for i in 0 to cNumberOfFEModules - 1 generate
 --==============================--
 
     signal ipb_to_channel   : ipb_wbus;
@@ -215,6 +215,18 @@ trigger_window_upper  <= control_registers(1)(3 downto 0);
 trigger_window        <= trigger_window_upper & trigger_window_lower;
 
 
+pRouteSTubsToOutput: process(clk_p)
+begin
+    if rising_edge(clk_p) then
+        for i in 0 to cNumberOfFEModules - 1 loop
+            q(cDTCOutputLinkMap(i)).valid <= stubs(i).valid;
+            q(cDTCOutputLinkMap(i)).data <= stubs(i).data;
+            q(cDTCOutputLinkMap(i)).strobe <= '1';
+        end loop;
+    end if;
+end process;
+
+
 pHistogram: process(clk_p)
 begin
     if rising_edge(clk_p) then