drm/msm: Only add available components

When trying to get the display up on my sdm845 board I noticed that
the display wouldn't probe if I had the dsi1 node marked as "disabled"
even though my board doesn't use dsi1.  It looks like the msm code
adds all nodes to its list of components even if they are disabled.  I
believe this doesn't work because all registered components need to
come up before we finish probing.  Let's do like other DRM code and
only add available components.

Change-Id: I00738a7f9fa572f12067066e86ea7974693b3aab
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Rob Clark <robdclark@gmail.com>
Link: https://patchwork.kernel.org/patch/10712329/
Git-commit: d1d9d0e1724d6a7123b4280fdf6630ae70f96c9c
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Signed-off-by: Nilaan Gunabalachandran <ngunabal@codeaurora.org>