qcom-charger: smb2: support for micro USB mode

Add support to disable TypeC mode of charger hardware
and enable micro USB mode. Enabling micro USB mode involves
following changes:
- hvdcp needs to be kept enabled. Create a new votable hvdcp_enable
  and vote true when uUSB connector is in use.
- Add support of extcon for sending notification to USB driver.

Change-Id: I109c07cd15052f4be15fee203f7cbaf02b6fd5cf
Signed-off-by: Ashay Jaiswal <ashayj@codeaurora.org>