msm: pm: Add support to query cpu status

During hotplug operation primary core is required to query
cpu registers to determine whether secondary core has
successfully shutdown.

Change-Id: I519e58fa71c94ab5d57c371306e10065c5e3f673
msm: acpuclock-krait: Confirm power-collapse before disabling CPU clocks

Forward port commit: 34c2d9628cb0fd471f43f92f04a6a9dc8df33129
to acpuclock-krait. This uses checks if a core is truly power collapsed
before disabling it's clock. This resolves the periodic reboot issue
affecting HTC 8960 devices if l2cpmr_iaddr is set to 0x501.

Change-Id: I92b4d72fbd136d74929b565866b78e4fa9686a50
defconfig: Switch back to intellidemand