drm/xe: Drop duplicated declaration

The declaration of xe_reg_whitelist_process_engine() function does
not fit into "xe_wa.h" and is already a duplicate.
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240613195702.2164-1-michal.wajdeczko@intel.com

drivers/gpu/drm/xe/xe_hw_engine.c

@@ -26,6 +26,7 @@
 #include "xe_macros.h"
 #include "xe_mmio.h"
 #include "xe_reg_sr.h"
+#include "xe_reg_whitelist.h"
 #include "xe_rtp.h"
 #include "xe_sched_job.h"
 #include "xe_sriov.h"

drivers/gpu/drm/xe/xe_wa.h

@@ -17,8 +17,6 @@ void xe_wa_process_gt(struct xe_gt *gt);
 void xe_wa_process_engine(struct xe_hw_engine *hwe);
 void xe_wa_process_lrc(struct xe_hw_engine *hwe);
 void xe_wa_apply_tile_workarounds(struct xe_tile *tile);
-
-void xe_reg_whitelist_process_engine(struct xe_hw_engine *hwe);
 void xe_wa_dump(struct xe_gt *gt, struct drm_printer *p);
 
 /**