Revert "staging: ion: Add GFP_NO_KSWAPD flag to high order allocations"

This reverts commit 34a28f93e64f80d6f6bd5bf945a0f48e09957540.
Revert "ion: Squashed commit of upstream updates"

This reverts commit 1ec369a25dac64764f62cbd36679651c34007a52.