mrw-rev.bbclass: bump version

Change-Id: I1a96a31a082f6bf1948ce15dd4f5a1a1769545de
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/classes/mrw-rev.bbclass b/classes/mrw-rev.bbclass
index 1e56d8e..16cabc0 100644
--- a/classes/mrw-rev.bbclass
+++ b/classes/mrw-rev.bbclass
@@ -2,4 +2,4 @@
 MRW_API_SRCREV ?= "60c8e10cbb11768cd1ba394b35cb1d6627efec42"
 
 MRW_TOOLS_SRC_URI ?= "git://github.com/openbmc/phosphor-mrw-tools"
-MRW_TOOLS_SRCREV ?= "a93e2097d17e4b8d0eae48c477c12a6f03278e75"
+MRW_TOOLS_SRCREV ?= "457653333a01917ca4297b76110232e64c50da16"