dt-bindings: Add property for ROI MISR

Add ROI MISR property and DSPP bypass property to indicate
hardware related registers.
Add "qcom,sde-has-roi-misr" to indicate if ROI MISR feature
is available or not.

Change-Id: I0eb9bc10babe31f5a8364f3f7ebc5f997a0cc62f
Signed-off-by: Zhiqiang Liu <zhiqliu@codeaurora.org>