Revert "ancora_defconfig: Compile TUN as module"

If you compile it built-in, users complain it doesn't work.
If you compile it as module, users complain it doesn't work.

Fuck it, and keep it as it was.

This reverts commit 60b6f8344b1753b5b50d15f5eb13c3147e48bf55.
update ariesve_defconfig