power: bq2419x: read fault status register two times

power: bq2419x: read fault status register two times

The fault status register should be read two times to get correct
status of fault and clearing it.

So read this register two times and ORed the status to get correct
fault status on current interrupt cycle.

Change-Id: I2c392d9473952a126ffe5d739a54ebf200e3181f
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: http://git-master/r/404995
Reviewed-on: http://git-master/r/406973
Reviewed-by: Mandar Padmawar <mpadmawar@nvidia.com>
Tested-by: Mandar Padmawar <mpadmawar@nvidia.com>