Witherspoon XML revision bump

Bump the github.com/open-power/witherspoon-xml revision
to pick up:
1) LED fixes
2) fan tach wiring for presence detects

Change-Id: I8c083393f43dd8b5958cc145e5b7cd27815ce402
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
1 file changed