drm/xe: fix missing 'xe_vm_put'

Fix memleak caused by missing xe_vm_put

Fixes: 852856e3 ("drm/xe: Use reserved copy engine for user binds on faulting devices")
Signed-off-by: Dafna Hirschfeld <dhirschfeld@habana.ai>
Reviewed-by: Nirmoy Das <nirmoy.das@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240901044227.1177211-1-dhirschfeld@habana.aiSigned-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
(cherry picked from commit 249df8cbecf0ab4877eab66cae857748631831a9)
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>

drivers/gpu/drm/xe/xe_exec_queue.c

@@ -223,8 +223,10 @@ struct xe_exec_queue *xe_exec_queue_create_bind(struct xe_device *xe,
 							   gt->usm.reserved_bcs_instance,
 							   false);
 
-		if (!hwe)
+		if (!hwe) {
+			xe_vm_put(migrate_vm);
 			return ERR_PTR(-EINVAL);
+		}
 
 		q = xe_exec_queue_create(xe, migrate_vm,
 					 BIT(hwe->logical_instance), 1, hwe,