cgpt: fix -A documentation to match reality

The documentation claims the -A option shows the raw 64-bit attributes
field when in reality it only shows the high reserved 16-bits.  Change
the docs to match the code.

BUG=chromium:644845
TEST=vboot_reference unittests pass
BRANCH=None

Change-Id: If163896ddbca0dc27ac8205db313031e73a68fd7
Reviewed-on: https://chromium-review.googlesource.com/382431
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
2 files changed