msm: sde: use min bus vote during init

Enable minimum bus voting during rotator initialization.
This is needed to allow the correct underlying hardware
driver and features to be selected.

CRs-Fixed: 2040984
Change-Id: If2fa5c10a028227941893d0efedc8b53c4145464
Signed-off-by: Clarence Ip <cip@codeaurora.org>