drm/xe/vf: Don't initialize stolen memory manager if VF

VF drivers don't have access to the stolen memory.
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240213154355.1221-5-michal.wajdeczko@intel.com

drivers/gpu/drm/xe/xe_ttm_stolen_mgr.c

@@ -19,6 +19,7 @@
 #include "xe_gt.h"
 #include "xe_mmio.h"
 #include "xe_res_cursor.h"
+#include "xe_sriov.h"
 #include "xe_ttm_stolen_mgr.h"
 #include "xe_ttm_vram_mgr.h"
 #include "xe_wa.h"
@@ -205,7 +206,9 @@ void xe_ttm_stolen_mgr_init(struct xe_device *xe)
 	u64 stolen_size, io_size, pgsize;
 	int err;
 
-	if (IS_DGFX(xe))
+	if (IS_SRIOV_VF(xe))
+		stolen_size = 0;
+	else if (IS_DGFX(xe))
 		stolen_size = detect_bar2_dgfx(xe, mgr);
 	else if (GRAPHICS_VERx100(xe) >= 1270)
 		stolen_size = detect_bar2_integrated(xe, mgr);