wb_pcie: converted arria2 ip to quartus 18.1

platform/altera/wb_pcie/arria2_pcie_hip.txt

--- megafunction wizard: %IP Compiler for PCI Express v16.0%
+-- megafunction wizard: %IP Compiler for PCI Express v18.1%
 
 -- Retrieval info: <?xml version="1.0"?>
--- Retrieval info: <MEGACORE title="IP Compiler for PCI Express"  version="16.0"  build="218"  iptb_version="1.3.0 Build 218"  format_version="120" >
+-- Retrieval info: <MEGACORE title="IP Compiler for PCI Express"  version="18.1"  build="218"  iptb_version="1.3.0 Build 218"  format_version="120" >
 -- Retrieval info:  <NETLIST_SECTION class="altera.ipbu.flowbase.netlist.model.MVCModel"  active_core="altpcie_hip_pipen1b" >
 -- Retrieval info:   <STATIC_SECTION>
 -- Retrieval info:    <PRIVATES>