msm: mdss: mdp version and iommu domain name update for ferrum

Update mdp version for ferrum which is MDP3.05. Also align the
iommu domain index for mdp3 with mdp5 as DSI 6g uses this.

Change-Id: I89d5b6daaf76c7fa9a4a077d83800b8bba0d4942
Signed-off-by: Shivaraj Shetty <shivaraj@codeaurora.org>