drm/{i915,xe}/display: drop intel_wakeref.h usage

drm/{i915,xe}/display: drop intel_wakeref.h usage

Drop the display dependency on intel_wakeref.h header. The contract in
the parent interface is that -ENOENT means there's no tracking. It
doesn't actually require us to use a shared macro for it. Duplicate the
macro in the few places that need this instead of inlining, primarily
for documentation reasons.

This allows us to remove the xe compat intel_wakeref.h header.

v2: Define INTEL_WAKEREF_DEF in intel_display_power.h

Reviewed-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://patch.msgid.link/3599d0ec168d7ce7030582706acba66b616ab9f3.1764076995.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>