drm/xe/vf: Skip engine ring enabling if VF

All engines will be correctly initialized by the PF driver.
Moreover, VF drivers can't access related engine registers.
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Piotr Piórkowski <piotr.piorkowski@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240619214557.905-9-michal.wajdeczko@intel.com

drivers/gpu/drm/xe/xe_hw_engine.c

@@ -547,6 +547,7 @@ static int hw_engine_init(struct xe_gt *gt, struct xe_hw_engine *hwe,
 		if (hwe->class == XE_ENGINE_CLASS_OTHER)
 			hwe->irq_handler = xe_gsc_hwe_irq_handler;
 
+		if (!IS_SRIOV_VF(xe))
 			xe_hw_engine_enable_ring(hwe);
 	}