ARM: dts: msm: Enable droop and fault detection for pmicobalt flash LED

Add device tree properties to enable detection of VPH droop,
short circuit and open circuit faults for flash LED on pmicobalt.

CRs-Fixed: 1024187
Change-Id: I13cf07b36f7bb890a71bedb9998a937e2c60ecb0
Signed-off-by: Devesh Jhunjhunwala <deveshj@codeaurora.org>