drm/i915/display: drop extra includes from intel_display_types.h

Drop some unnecessary includes from intel_display_types.h.

Reviewed-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/bf61599a9cafd9c674a23296eca305fcbf6f44c1.1724689818.git.jani.nikula@intel.com