Adding suspend/resume function for tegra_cpu_car_ops. We only save and
restore the setting of the clock of CoreSight. Other clocks still need
to be taken care by clock driver.

Cc: Mike Turquette <mturquette@linaro.org>
Signed-off-by: NJoseph Lo <josephl@nvidia.com>
Acked-by: NStephen Warren <swarren@nvidia.com>

Hook the functions for CPU hotplug support. After the CPU is hot
unplugged, the flow controller will handle to clock gate the CPU clock.
But still need to implement an empty function to avoid warning message.

Cc: Mike Turquette <mturquette@linaro.org>
Signed-off-by: NJoseph Lo <josephl@nvidia.com>

Implement clock support for Tegra124.
Signed-off-by: NPeter De Schrijver <pdeschrijver@nvidia.com>