max17042: Added support for max17050 chip

max17042: Added support for max17050 chip

BZ: 24846

This patch adds the support for max17050 chip to the existing
max17042 fuel gauge driver.

Change-Id: Idd88d1989884fee5990db393699f8654d021a16c
Signed-off-by: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
Reviewed-on: http://android.intel.com:8080/39278
Reviewed-by: Kanigeri, Hari K <hari.k.kanigeri@intel.com>
Reviewed-by: Tc, Jenny <jenny.tc@intel.com>
Tested-by: Gugwad, SantoshX <santoshx.gugwad@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>