drm/i915/dmc: use step name from runtime info
Now that the step name is in runtime info, switch to using it instead of
intel_step_name().
The ** are only relevant for DMC, so make their use explicit.
Reviewed-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://patch.msgid.link/395906e52e76bc726b9dac69a453583cc6e3f6c1.1773663208.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>