cardhu: merge mr1.1 changes

* Reference commit: 5f0f8fdea82f73dc9c8b3571089a56cf05d468cd in
  kernel/asus/grouper

Change-Id: I07106b43d6afeb90cf1a4c0904c3dcee21ab9a8f
hotplug: tune some hotplugging parameters and fix disabling cores
nvidia-hotplug: fix to disable it properly
defconfig: disable nvidia tegra hotplugging completly (dumb mistake, it was conflicting with thalamus hotplugging routines)