[otbn] Add second EDN connection

OTBN needs two connections, one for RND and URND. This purely adds the
second EDN connection, RND and URND are not yet implemented.

Fixes #5523

Signed-off-by: Greg Chadwick <gac@lowrisc.org>
diff --git a/hw/ip/edn/rtl/edn.sv b/hw/ip/edn/rtl/edn.sv
index 44cc3f7..f004a56 100644
--- a/hw/ip/edn/rtl/edn.sv
+++ b/hw/ip/edn/rtl/edn.sv
@@ -10,7 +10,7 @@
   import edn_pkg::*;
   import edn_reg_pkg::*;
 #(
-  parameter int NumEndPoints = 6,
+  parameter int NumEndPoints = 7,
   parameter logic [NumAlerts-1:0] AlertAsyncOn = {NumAlerts{1'b1}},
   parameter int BootInsCmd = 32'h0000_0001,
   parameter int BootGenCmd = 32'h00ff_f003