Revert "Revert "Enable samsung power mang.""

This reverts commit 5d8fc38bfcda91ffa614a36e8edffe62ff82a656.
Revert "Update SIO scheduler"

This reverts commit 89976bade5b861e28d95929e2151e567a9e897fe.
update defconfig
Revert "add extra free kbytes tunable"

This reverts commit 12b6dae6324e4af34d2dfaf522104c4b845f7163.