msm: mdss: Enable rotator smmu domain based on DT setting

To support new v4l2 rotator driver, rotator smmu domains in
MDSS driver will be enabled based on device tree boolean setting.
This allows smmu to be associated with MDSS driver or external
rotator driver for MDS block, such as 3.0.0 onward, with a
separate rotator block, or for MDSS block, pre 2.0.0, with
built-in writeback rotator.

CRs-Fixed: 973961
Change-Id: I68ac7b1b89485d1ce46bdb1c1739c3306a7d7d89
Signed-off-by: Alan Kwong <akwong@codeaurora.org>