power: qpnp-smb5: Disable CP(s) as part of thermal mitigation

Add support to disable the charge pump(s) when the system
health is overheat. Configure the ICL of main charger to 500mA
in this condition.

Change-Id: Ied81bd08cbf950fe9cb2ee267eeb75adbbfe6530
Signed-off-by: Sahil Chandna <chandna@codeaurora.org>