fix(packeter): set data to zero when frame_error

* This avoid to transmit one BPM packet replication to the central.

hdl/ccn_pack.vhd

@@ -249,7 +249,8 @@ begin
 
     sup_arb_res_s1 <= not header_tready;
 
-    pkt_ix_tdata       <= pkt_reg_tdata;
+    pkt_ix_tdata       <= pkt_reg_tdata when frame_error = '0' else
+                          (others => '0');
     pkt_ix_tvalid      <= frame_error or reg_tvalid;
     pkt_ix_tlast       <= frame_error or pkt_cnt_zero;
     pkt_ix_tuser       <= (others => frame_error);