power: smb2: fix QC2 adapter collapse

Some QC2 adapters might collapse when next higher voltage is
requested, fix this by lowering ICL before forcing next voltage
level and removing the vote once adapter moves to next voltage(this
ensures h/w AICL will find appropriate ICL for the higher voltage).

Change-Id: I888e30e0bf8638b770068fe5a314bc91de992db4
Signed-off-by: Ashay Jaiswal <ashayj@codeaurora.org>