techpack: Kbuild: Fix to compile the techpack completely

Due to path being inaccurate, the techpack folder was not being
compiled completely. Using techpack fixes this issue.

Change-Id: Id06927e5b4bfad0d5c8208b199d9d217abbf6306
Signed-off-by: Prakruthi Deepak Heragu <pheragu@codeaurora.org>
Signed-off-by: Adam Bickett <abickett@codeaurora.org>