servo: Make ina config match output from mosys

Currently, we generate INA config in [board]_rev_[number]
format, make it [board]_rev[number] format to match the
output from "mosys platform version" command

BUG=b:126424094
TEST=emerge hdctools.
check file in /usr/lib64/python2.7/site-packages/servo/data

Change-Id: I33eddf217e0ea1bcd38dd80178290840097c38fe
Signed-off-by: Puthikorn Voravootivat <puthik@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1490591
Reviewed-by: Ruben Rodriguez Buchillon <coconutruben@chromium.org>
2 files changed