rcu: Remove the CONFIG_TINY_RCU ifdefs in rcutiny.h

Now that CONFIG_TINY_PREEMPT_RCU is no more, this commit removes
the CONFIG_TINY_RCU ifdefs from include/linux/rcutiny.h in favor of
unconditionally compiling the CONFIG_TINY_RCU legs of those ifdefs.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
[ paulmck: Moved removal of #else to "Remove TINY_PREEMPT_RCU" as
  suggested by Josh Triplett. ]
Reviewed-by: Josh Triplett <josh@joshtriplett.org>

include/linux/rcutiny.h

@@ -37,8 +37,6 @@ static inline void rcu_barrier_sched(void)
 	wait_rcu_gp(call_rcu_sched);
 }
 
-#ifdef CONFIG_TINY_RCU
-
 static inline void synchronize_rcu_expedited(void)
 {
 	synchronize_sched();	/* Only one CPU, so pretty fast anyway!!! */
@@ -49,8 +47,6 @@ static inline void rcu_barrier(void)
 	rcu_barrier_sched();  /* Only one CPU, so only one list of callbacks! */
 }
 
-#endif /* #ifdef CONFIG_TINY_RCU */
-
 static inline void synchronize_rcu_bh(void)
 {
 	synchronize_sched();
@@ -72,8 +68,6 @@ static inline void kfree_call_rcu(struct rcu_head *head,
 	call_rcu(head, func);
 }
 
-#ifdef CONFIG_TINY_RCU
-
 static inline void rcu_preempt_note_context_switch(void)
 {
 }
@@ -84,8 +78,6 @@ static inline int rcu_needs_cpu(int cpu, unsigned long *delta_jiffies)
 	return 0;
 }
 
-#endif /* #ifdef CONFIG_TINY_RCU */
-
 static inline void rcu_note_context_switch(int cpu)
 {
 	rcu_sched_qs(cpu);