[Revert Me] Option to choose between HSI and Standby on CVT platform through cmdline.

[Revert Me] Option to choose between HSI and Standby on CVT platform through cmdline.

BZ: 33285

Currently HSI Modem 7060(BZ# 28529) is having a issue on CVT Platform and
it will not go to Low Power Mode. Standby will not work if HSI is enabled.
So HSI and Standby can be mutually exclusive.
So This patch provides the option to choose between Standby/HSI based on enable_stadby 1/0.
HSI Bug is Trached seprately through 28529.

Change-Id: Iba08d8f27166a64d8924268a5faa35ee1bcf5a28
Signed-off-by: Vishwesh M Rudramuni <vishwesh.m.rudramuni@intel.com>
Signed-off-by: Nivedha Krishnakumar <nivedha.krishnakumar@intel.com>
Signed-off-by: Ramachandra Sudarshan N <sudarshan.n.ramachandra@intel.com>
Signed-off-by: Youvedeep Singh <youvedeep.singh@intel.com>
Signed-off-by: Dyut K Sil <dyut.k.sil@intel.com>
Reviewed-on: http://android.intel.com:8080/45940
Reviewed-by: Mansoor, Illyas <illyas.mansoor@intel.com>
Tested-by: Martin, LoicX <loicx.martin@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>