power: bq2419x:configure PWR ON REG when safety timer expires

power: bq2419x:configure PWR ON REG when safety timer expires

enable safety timer and configure power on register
from ISR and resume path when safety timer expired.
set rtc alarm timer based on parameter value passed through
dt file only when battery in CHARING done state and high charging current
cable connected to wake up device from LP0.

Bug 1440235

Change-Id: I2fb8121c6183a8367c8bd869f43373062fdbb630
Signed-off-by: Venkat Reddy Talla <vreddytalla@nvidia.com>
Reviewed-on: http://git-master/r/392334
Reviewed-by: Mrutyunjay Sawant <msawant@nvidia.com>
Tested-by: Mrutyunjay Sawant <msawant@nvidia.com>