drm/i915/display: no need for gt/gen8_ppgtt.h

Remove an unnecessary include.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221208133638.478024-1-jani.nikula@intel.com

drivers/gpu/drm/i915/display/intel_display.c

@@ -70,8 +70,6 @@
 #include "gem/i915_gem_lmem.h"
 #include "gem/i915_gem_object.h"
 
-#include "gt/gen8_ppgtt.h"
-
 #include "g4x_dp.h"
 #include "g4x_hdmi.h"
 #include "hsw_ips.h"