drm/msm/sde: add topology management properties

Need to expose connector properties for user interaction with
dynamic hardware resource mapping to drm object topologies.
Expose topology_control property on each connector to allow user
control reservation behavior. An immutable topology_name
property is exposed on each connector to allow user to query
active use case driver chose.

Change-Id: I97d22b9a1a8f6e0094f1148af8adb31c826a266a
Signed-off-by: Lloyd Atkinson <latkinso@codeaurora.org>