Revert "Revert "hotplug: Add intelli-plug 3.8 - Thanks to faux123""

This reverts commit b2d2eec0953d28fc6840d09c277ad8e850ab5df6.
Revert "Revert "Intelli-plug: sched: sched.h: Fix missed "#endif" issue""

This reverts commit aa555bf7d0533a401b9cb93dbd2dd54d84a22c1f.
intelli-plug: Downgrade to 3.7 ver.

There are booting problem with 3.8 ver.