drm/xe: Fix cast on trace variable

Cast the pointer to unsigned long and let it be implicitly extended to
u64. This fixes the build on 32bits arch.

Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240119001612.2991381-5-lucas.demarchi@intel.com

drivers/gpu/drm/xe/xe_trace.h

@@ -31,7 +31,7 @@ DECLARE_EVENT_CLASS(xe_gt_tlb_invalidation_fence,
 			     ),
 
 		    TP_fast_assign(
-			   __entry->fence = (u64)fence;
+			   __entry->fence = (unsigned long)fence;
 			   __entry->seqno = fence->seqno;
 			   ),