power: qcom-charger: Add support for software INOV

Hardware autonomous INOV does adapter's output voltage
manipulation only based on the input limited state of main
charger. This works well with MID-MID parallel configuration
but with USBIN-USBIN parallel configuration parallel charger's
input limited state also plays role for INOV manipulations.
Thus disable hardware based autonomous INOV and add support
for software based INOV for USBIN-USBIN configuration.

Note that if authentication is disabled, the hw assumes QC3.0 and
if the autonomous bit is enabled, it issues increment/decrement pulses.
This happens even when QC3.0 has not been actually authenticated.

Change-Id: I397acb558c9ba3b6fc7d7b974d64459f278697fd
Signed-off-by: Ashay Jaiswal <ashayj@codeaurora.org>
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>