Revert "msm: camera: ION migration for gemini driver (adapted)"

This reverts commit dc85a3e2b5128bcd4f93e01deb787867a376066d.
Revert "msm: camera: add ion support to native driver"

This reverts commit 0ec4182ca88bab4c0d76a6e251bfd09b78da83a6.
Vision: update defconfig for ion+pmem