remove something wo don't need

Change-Id: Id98c84b7fdd34dd74ece6c01125747f03c56d0ce
Revert "fix: we are using mount_all don't need thoose (TrueDualBoot seems to be finally working)"

This reverts commit 37ded00dbafbaf471f855197653b6aed8c226170.
add flag for mione_plus
Merge https://github.com/iptux/android_device_xiaomi_mione_plus/

Conflicts:
patches/README.md
patches/no_selinux.patch