power: qpnp-smbcharger: turn off AICL ADC measurements

The hardware AICL algorithm can use an internal ADC in order to jump to
the optimal AICL setpoint faster by doing a conversion when the collapse
happens and guessing the correct current limit from the data.

However, these ADC measurements can cause glitches in the AICL feature,
sometimes forcing the results to be 1-2 setpoints off from optimal.

Turn this feature off, and allow thet AICL algorithm to scan every
possible setpoint for a more accurate result.

CRs-Fixed: 920791
Change-Id: Ief47e8455bf89e8bd7703ec30e0fe3770b7895d6
Signed-off-by: Xiaozhe Shi <xiaozhes@codeaurora.org>