drm/i915/display: rename intel_modeset_probe_defer() -> intel_display_driver_probe_defer()

Follow the usual naming conventions.

Reviewed-by: Gustavo Sousa <gustavo.sousa@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/ab5023570d8ae55c0d9c98c78f588e51c0790b6c.1681465222.git.jani.nikula@intel.com