drm/i915: Add P010, P012, P016 plane control definitions

Add needed plane control flag definitions for P010, P012 and
P016 formats.

Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
Signed-off-by: Swati Sharma <swati2.sharma@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1551700595-21481-2-git-send-email-swati2.sharma@intel.com