ANDROID: include: drm: support unicasting mipi cmds to dsi ctrls

Add support into the drm_mipi_dsi framework to support
unicasting DCS commands to specific DSI controls within a panel.
This is required for partial update where region of interest
spans only on one controller in a dual controller configuration.
Also, Some display panel have the requirement of waiting for certain
duration before dsi host can read back the response from panel during
a DCS read command. This change adds the support to store
the delay required in dsi message structure.

Signed-off-by: Shashank Babu Chinta Venkata <sbchin@codeaurora.org>
Bug: 139653858
Change-Id: I3a99437441410a2514f9486d08ae3ba68670769e