qcom: hyp_core_ctl: Use hyp system call for vcpu to pcpu assignment

When an original reserved CPUs is managed by thermal, a replacement
CPU is assigned as the current physical CPU. Use hypervisor system call
to notify the current physical CPU corresponding the given virtual CPU.
When the thermal condition is gone, restore the original mapping.

Change-Id: Ib219a59db51b975286185f1b43d07491ba2262f0
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>