rcu: RCU-based detection of stalled CPUs for Classic RCU, fix

fix the !CONFIG_RCU_CPU_STALL_DETECTOR path:

 kernel/rcuclassic.c: In function '__rcu_pending':
 kernel/rcuclassic.c:609: error: too few arguments to function 'check_cpu_stall'
Signed-off-by: NIngo Molnar <mingo@elte.hu>

kernel/rcuclassic.c

@@ -239,7 +239,7 @@ static void record_gp_stall_check_time(struct rcu_ctrlblk *rcp)
 {
 }
 
-static void check_cpu_stall(struct rcu_ctrlblk *rcp, struct rcu_data *rdp)
+static inline void check_cpu_stall(struct rcu_ctrlblk *rcp)
 {
 }