qcom: smb-lib: fix adapter allowance for PMI632

PMI632 only supports VBUS voltage upto 9V, add support
to limit adapter allowance to maximum 9V for PMI632.

Change-Id: I6604fd50957287aef5e8570e66e370cb95bcbca3
Signed-off-by: Ashay Jaiswal <ashayj@codeaurora.org>