mdss: display-port: add support to configure stream attributes

Update the MISC settings register according the color
depth and format. Update the MVID and NVID registers
using the M and N values used to configuring
the DP pixel clock.

Change-Id: I67e08d3491fbb7c0960c463cc8f979238b89d818
Signed-off-by: Chandan Uddaraju <chandanu@codeaurora.org>