soc: qcom: msm_perf: Optionally compile out hotplug tunables

If msm_performance module and some other module with the
core hotplug capability (like core_ctl) co-exist and
both of them try to hotplug the cores system inconsistencies
can occur. To avoid such behavior sysfs nodes needed for hotplug
support in msm_performance module are compiled out.

Change-Id: I25e8404ce0581e718d6b55cd0e1f5c7da8e92db5
Signed-off-by: Prachee Ramsinghani <pracheer@codeaurora.org>