rcu: Update stray documentation references to rcu_dynticks_eqs_{enter, exit}()

rcu_dynticks_eqs_{enter, exit}() have been replaced by their
context-tracking counterparts since commit:

  1714767 ("context_tracking: Convert state to atomic_t")

Update the stray documentation references.

Signed-off-by: Valentin Schneider <[email protected]>
Reviewed-by: Frederic Weisbecker <[email protected]>
Signed-off-by: Neeraj Upadhyay <[email protected]>

Author: valschneider

Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst

@@ -147,8 +147,8 @@ RCU read-side critical sections preceding and following the current
 idle sojourn.
 This case is handled by calls to the strongly ordered
 ``atomic_add_return()`` read-modify-write atomic operation that
-is invoked within ``rcu_dynticks_eqs_enter()`` at idle-entry
-time and within ``rcu_dynticks_eqs_exit()`` at idle-exit time.
+is invoked within ``ct_kernel_exit_state()`` at idle-entry
+time and within ``ct_kernel_enter_state()`` at idle-exit time.
 The grace-period kthread invokes first ``ct_rcu_watching_cpu_acquire()``
 (preceded by a full memory barrier) and ``rcu_watching_snap_stopped_since()``
 (both of which rely on acquire semantics) to detect idle CPUs.