Inventory: Map chassis fru data

Make the association for chassis.
Update mrw revision due to co-req with script changes.

Change-Id: I42ef9edbf9714d302d7afe2a0851f5ca6f2fe579
Signed-off-by: Ratan Gupta <ratagupt@in.ibm.com>
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/classes/mrw-rev.bbclass b/classes/mrw-rev.bbclass
index 8032f42..649fb45 100644
--- a/classes/mrw-rev.bbclass
+++ b/classes/mrw-rev.bbclass
@@ -2,4 +2,4 @@
 MRW_API_SRCREV ?= "31155941629988f0adcf765e7e7dd3af34fb1214"
 
 MRW_TOOLS_SRC_URI ?= "git://github.com/openbmc/phosphor-mrw-tools"
-MRW_TOOLS_SRCREV ?= "5cb5f4e91dc05c59be05a369c8ed777b618d79ac"
+MRW_TOOLS_SRCREV ?= "c8dca9e8b87adfec6401d6f26b28a7b991a08b2b"