docs: Update documentation for FRU_Master.json

Signed-off-by: Tom Joseph <tomjoseph@in.ibm.com>
Change-Id: I0e9dba265e00f54342bd6e228f7b013135e6eb90
diff --git a/libpldmresponder/examples/fru/FRU_Master.json b/libpldmresponder/examples/fru/FRU_Master.json
index a99b476..e0a3ad2 100644
--- a/libpldmresponder/examples/fru/FRU_Master.json
+++ b/libpldmresponder/examples/fru/FRU_Master.json
@@ -1,14 +1,16 @@
 # This is the master config file for generating PLDM FRU records from the D-Bus
 # inventory objects. "service" is the name of D-Bus service hosting the
 # inventory D-Bus objects, "root_path" is the root path for all the inventory
-# D-Bus objects and "interfaces" section specifies the type of FRU's for which,
-# FRU records will be created in the FRU table. In this example, PLDM FRU
-# records will be created for all FRU's of type Board and CPU. For each FRU
-# type, corresponding config JSON's are needed for each record. In the example
-# directory, Board_General.json is the config to generate the General FRU record
-# for FRU of type Board and Board_VINI.json is the config to generate the OEM
-# record (VINI is a record in IBM IPZ VPD format) for FRU of type Board. For all
-# instances of the same FRU, the same config JSON will apply.
+# D-Bus objects and "entities" section specifies the type of FRU's for which
+# FRU records are created in the FRU table. FRU Record Set PDR and Entity
+# Association PDR are generated for matching FRU. In this example, PLDM FRU
+# records will be created for all FRU's of type Board and CPU. The "entity_type"
+# field is the PLDM entity type for Board and CPU. For each FRU type,
+# corresponding config JSON's are needed for each record. In the example
+# directory, Board_General.json is the config to generate the General FRU
+# record for FRU of type Board and Board_VINI.json is the config to generate
+# the OEM record (VINI is a record in IBM IPZ VPD format) for FRU of type Board.
+# For all instances of the same FRU, the same config JSON will apply.
 {
     "service":"xyz.openbmc_project.Inventory.Manager",
     "root_path":"/xyz/openbmc_project/inventory/system/",