esoc: Add back esoc files

Commit f06163e6
msm: reap unused kernel files
removes unused files from the kernel tree.
This patch mistakenly removed some of the files
that were merged by
commit 5ad7ffa1
esoc: Add external soc control framework
We add back the files that were removed from esoc.

Change-Id: I33750fed5272ce2d8e5f4b37347483920a4e8e95
Signed-off-by: Hanumant Singh <hanumant@codeaurora.org>