Revert "Revert "configs: enable ion""

This reverts commit 69a13bdd862f0770f86626913b18a95fe77774d6.
sw_sync: export sw_sync API

Needed to let modules link against sw_sync.

Change-Id: I71d3e52677ef21b6e1ecdb84f831491be1f4fbe6
Signed-off-by: Erik Gilling <konkers@android.com>
msm: kgsl: initialize kgsl_sync_timeline_ops properly

Signed-off-by: Iliyan Malchev <malchev@google.com>