Updates zx_vmar_*_old() callers back to the zx_vmar_*() equivalents,
which have a new parameter order.

Change-Id: I1662b4fbb866cef4eedc13e0db3e9389d4375d1e
Reviewed-on: https://chromium-review.googlesource.com/1199903
Commit-Queue: Wez <wez@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55562}