rcupreempt: remove export of rcu_batches_completed_bh

In rcupreempt, rcu_batches_completed_bh is defined as a static inline in
the header file. This does not need to be exported, and not only that,
this breaks my PPC build.

Signed-off-by: Steven Rostedt <[e-mail]>
Cc: "Paul E. McKenney" <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Signed-off-by: Thomas Gleixner <[e-mail]>

kernel/rcupreempt.c

···
 }
 EXPORT_SYMBOL_GPL(rcu_batches_completed);
 
-EXPORT_SYMBOL_GPL(rcu_batches_completed_bh);
-
 void __rcu_read_lock(void)
 {
 	int idx;