soc: qcom: Add add cpu idle v7 support for mdm9607

This is snapshot of idle v7 as of msm-3.18.c8.
'commit 69da6b6721b'.

Change-Id: I01adeac3d8b53b855300a3a12714e035b758a8c4
Signed-off-by: Suresh Kumar Allam <allamsuresh@codeaurora.org>
Signed-off-by: Shiva Niranjan <shia@codeaurora.org>
Signed-off-by: Sivasri Kumar Vanka <sivasri@codeaurora.org>