drm/msm/sde: dynamic hardware resource manager

Add facility that will give ability to dynamically allocate
hardware resources to use cases based on availability and
requested parameters. Resources are tested at atomic_check
time, and locked during mode_set in atomic_commit time.

Change-Id: I4c316c3b9ca4fa57c3a1538be508c6daaffb88d1
Signed-off-by: Lloyd Atkinson <latkinso@codeaurora.org>