Update P10 chip data XML

Signed-off-by: Zane Shelley <zshelle@us.ibm.com>
Change-Id: Ia864d6b7cb6bea6f245c0794687b0d32f2a3691c
diff --git a/xml/p10/node_pci_nest_fir.xml b/xml/p10/node_pci_nest_fir.xml
index 6f5b261..d594ebe 100644
--- a/xml/p10/node_pci_nest_fir.xml
+++ b/xml/p10/node_pci_nest_fir.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<attn_node model_ec="P10_10" name="PCI_NEST_FIR" reg_type="SCOM">
+<attn_node model_ec="P10_10,P10_20" name="PCI_NEST_FIR" reg_type="SCOM">
     <local_fir config="W" name="PCI_NEST_FIR">
         <instance addr="0x03011840" reg_inst="0"/>
         <instance addr="0x03011880" reg_inst="1"/>