drm/i915/display: use display runtime PM interfaces for for atomic state

drm/i915/display: use display runtime PM interfaces for for atomic state

Convert intel_atomic_commit() and intel_atomic_commit_tail() to use
display runtime PM interfaces. Also convert the wakeref member type to
struct ref_tracker *, which is the same as intel_wakeref_t, but without
the typedef.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://lore.kernel.org/r/2682fa92089ab87429eef4d45f931839f0d32077.1742483007.git.jani.nikula@intel.com