drm/i915: Remove pointless extra namespace from dkl/snps buf trans structs

The struct itself already has sufficient namespace. No need to
duplicate it in the members.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211006204937.30774-2-ville.syrjala@linux.intel.com


Reviewed-by: Jani Nikula <jani.nikula@intel.com>