sched/fair: Fix kabi borken in sched_domain_shared

commit 222d84a0de0d2dbd75b2c73f469d74868955f3b5 openeuler.

--------------------------------

The sched_domain_shared structure is only used as pointer, and other
drivers don't use it directly.

Signed-off-by: Xue Sinian <tangyuan911@yeah.net>

include/linux/sched/topology.h

@@ -89,7 +89,9 @@ struct sched_domain_shared {
 	atomic_t	ref;
 	atomic_t	nr_busy_cpus;
 	int		has_idle_cores;
+#ifndef __GENKSYMS__
 	int		nr_idle_scan;
+#endif
 #ifdef CONFIG_ARM64
 } ____cacheline_aligned;
 #else