UPSTREAM: drm: create struct drm_object_properties and use it

UPSTREAM: drm: create struct drm_object_properties and use it

For now, only connectors have it. In the future, all objects that need
properties should use it. Since the structure is referenced inside
struct drm_mode_object, we will be able to deal with object properties
without knowing the real type of the object.

Reviewed-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Reviewed-by: Rob Clark <rob.clark@linaro.org>
Tested-by: Rob Clark <rob.clark@linaro.org>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
(cherry picked from commit 7e3bdf4a6dca9eb153cc20d69d717308a68bec00)

BUG=chrome-os-partner:17074
TEST=Use hardware cursor with kernel v3.8 and v3.4 and no flicker on screen.

Change-Id: Ic125db59d6c7a4d11671f5f3529a7bf409367e87
Signed-off-by: Prathyush K <prathyush.k@samsung.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/40511
Tested-by: Prathyush Kalashwaram <prathyush@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Commit-Queue: Stéphane Marchesin <marcheu@chromium.org>