Revert "ion: change ion buffer flags"

This reverts commit 8e14af961e5d0e2cdbfb54b6388263753824075c.
Revert "ion: change ion kernel map function to not take flags"

This reverts commit 1f14e5897fbef4e87768d86021adccf18426ebff.
Revert "ion: Port heap mask change to ion"

This reverts commit 9fa94cbb5d66b09ad10205366a936f945b0afdab.
Revert "msm: ion: Only return Ion flags in ion_handle_get_flags"

This reverts commit 4dc78f46045b4d4d2e0467ee619970b2606a9f63.
Revert "gpu: ion: repurpose flags field for heap_mask and caching"

This reverts commit 3eb9e9f319387547b9efbd6a14b53f4c5736af11.