Witherspoon XML revision bump

Picks up 3 specific BMC related changes:
1) Add power supply fault LEDs
2) Give the turbo_allowed sensor a valid value
3) Assign FRU IDs to the GPUs

Resolves openbmc/openbmc#922

Change-Id: I02c3bbf316a8f01faad17b19efe284572784a791
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
diff --git a/meta-witherspoon/conf/machine/witherspoon.conf b/meta-witherspoon/conf/machine/witherspoon.conf
index 8440a9a..8fb5c49 100644
--- a/meta-witherspoon/conf/machine/witherspoon.conf
+++ b/meta-witherspoon/conf/machine/witherspoon.conf
@@ -15,7 +15,7 @@
 require conf/machine/include/p9.inc
 
 PHOSPHOR_MRW_URI = "git://github.com/open-power/witherspoon-xml"
-PHOSPHOR_MRW_REV = "43746576272c530459e5440ed5458ea2da6e83af"
+PHOSPHOR_MRW_REV = "6ca015dbd3e1e9d5206f9ec13ec9db2d8965e181"
 
 DISTRO_FEATURES_append = "\
         obmc-openpower \