[PORT FROM R2] atomisp: add load shading table interface

[PORT FROM R2] atomisp: add load shading table interface

BZ: 17272

This patch adds to Atomisp driver interface to load shading table from
userspace.

Change-Id: Ie1b58b8215660c7b972c292f3f817e24ddd013fe
Orig-Change-Id: I6a1c34a899f1afc8e5ec1c384791e957992ff422
Signed-off-by: David Cohen <david.a.cohen@intel.com>
Signed-off-by: Miikka Tuppurainen <miikka.tuppurainen@intel.com>
Reviewed-on: http://android.intel.com:8080/22559
Reviewed-by: Wada, Yoshio <yoshio.wada@intel.com>
Tested-by: Koski, Anttu <anttu.koski@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>
Reviewed-on: http://android.intel.com:8080/27997
Reviewed-by: Tuominen, TeemuX <teemux.tuominen@intel.com>
Reviewed-by: Koski, Anttu <anttu.koski@intel.com>