setup-mel-builddir: only pull in updates with included deps

In other words, only pull in update-atp-* if atp is configured. This ensures
that update-atp-* aren't included for mel builds.

JIRA: SB-2312

Signed-off-by: Christopher Larson <kergoth@gmail.com>
Merge pull request #111 from kergoth/no-atp-updates-for-mel

setup-mel-builddir: only pull in updates with included deps