The hooks aren't supposed to modify the ELD, so use const pointer. As a
drive-by fix, use drm_eld_size() to log ELD size.
Suggested-by: NVille Syrjala <ville.syrjala@linux.intel.com>
Reviewed-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: NJani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180619124437.10982-1-jani.nikula@intel.com