arm64: Add support for app specific settings

Add support to provide an interface that can be used from
userspace to decide whether app specific settings need to
be applied / cleared when particular processes are running.

CRs-Fixed: 981519
Change-Id: Id81f8b70de64f291a8586150f4d2c7c8f8b4420f
Signed-off-by: Sarangdhar Joshi <spjoshi@codeaurora.org>