drm/i915/drv: drop intel_bios.h include

No longer needed after panel data was moved.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Acked-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220607094207.536699-2-jani.nikula@intel.com