[edn] supply default value evne though data port not used

Signed-off-by: Timothy Chen <timothytim@google.com>
diff --git a/hw/ip/edn/rtl/edn_core.sv b/hw/ip/edn/rtl/edn_core.sv
index 348487f..e560076 100644
--- a/hw/ip/edn/rtl/edn_core.sv
+++ b/hw/ip/edn/rtl/edn_core.sv
@@ -493,7 +493,7 @@
     .clk_i(clk_i),
     .rst_ni(rst_ni),
     .req_i(packer_arb_req), // N number of reqs
-    .data_i(),
+    .data_i('{NumEndPoints{'0}}),
     .gnt_o(packer_arb_gnt), // N number of gnts
     .idx_o(), //NC
     .valid_o(packer_arb_valid),