fpga: rfnoc: Move synthesizable code from sim to lib

Original-commit: d9f8c08dfb1afe98c35c5911125c6eead869713f

lib/rfnoc/sim/eth_ipv4_interface_tb/eth_ipv4_interface_tb.sv

@@ -43,7 +43,8 @@ module eth_ipv4_interface_tb #(
   `include "../../xport_sv/eth_regs.vh"
 
   import PkgTestExec::*;
-  import PkgChdrUtils::*;
+  import rfnoc_chdr_utils_pkg::*;
+  import PkgChdrData::*;
   import PkgChdrIfaceBfm::*;
   import PkgAxiStreamBfm::*;
   import PkgChdrBfm::*;