drm/i915/display: add intel_display_driver_early_probe()

Add intel_display_driver_early_probe() as the early probe call to
replace intel_init_display_hooks(). The latter will be "demoted" to
setting up hooks in intel_display.c only.

Reviewed-by: Gustavo Sousa <gustavo.sousa@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/0b02311e5343527b501b44671d2188f2a1b30a7d.1681465222.git.jani.nikula@intel.com