drm/msm/sde: update csc property definition and type

Blob properties under DRM require a new blob to be created for
each unique set of incoming data. By changing the csc property
to accept an incoming user space pointer and using copy_from_user
to explicitly copy out the structure data each time the property
is set, the user space client avoids the need to create new
DRM blob objects when the csc configuration needs to be updated.

Change-Id: I7586d407ef9d65a927c93b59cdd0128cef498378
Signed-off-by: Clarence Ip <cip@codeaurora.org>