drm/display: Reorder Kconfig symbols

The display kconfig helpers are not organized in any particular order,
so let's move them around to create an alphabetical order.

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://lore.kernel.org/r/20240327-kms-kconfig-helpers-v3-5-eafee11b84b3@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org>