Battery: Fix for reporting charger health DEAD when VBUS is low

Battery: Fix for reporting charger health DEAD when VBUS is low

BZ: 22487

This patch reports charger health as DEAD,when VBUS voltage is low
connected through DCP using external power supply

Change-Id: I4e8039fad2ecc6716d83d303a4baa091eb89d0b3
Signed-off-by: Gurumurthy Gowdar <gurumurthyx.gowdar@intel.com>
Reviewed-on: http://android.intel.com:8080/37981
Reviewed-by: Tc, Jenny <jenny.tc@intel.com>
Reviewed-by: Kuppuswamy, Sathyanarayanan <sathyanarayanan.kuppuswamy@intel.com>
Reviewed-by: Jena, TapanX <tapanx.jena@intel.com>
Tested-by: Gugwad, SantoshX <santoshx.gugwad@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>