[PORT FROM R2] Battery: remove battery validity check code

[PORT FROM R2] Battery: remove battery validity check code

BZ: 19918

This patch removes the battery validity check code from the driver
as it is done by IAFW. IAFW populates SFI table for battery if it
valid else OEM0 Battery table will not be populated.

Change-Id: I4bff022edc84281d2bbf9aee3b86b54f187d8013
Signed-off-by: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
Conflicts:

	drivers/power/intel_mdf_battery.c

Change-Id: I718f65ff35d190c56b6861daf9df5ef8ad86e8c0
Signed-off-by: Eduardo Mendi <eduardox.mendi@intel.com>
Reviewed-on: http://android.intel.com:8080/32758
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>