Revert docs from "treewide: Rename rcu_dereference_raw_notrace() to _check()"

This reverts docs from commit 355e997.

Signed-off-by: Joel Fernandes (Google) <[email protected]>
[ paulmck: Added Joel's SoB per Stephen Rothwell feedback. ]
[ paulmck: Joel approved via private email. ]
Signed-off-by: Paul E. McKenney <[email protected]>

Author: joelagnel

Documentation/RCU/Design/Requirements/Requirements.html

@@ -2512,7 +2512,7 @@ <h3><a name="Tracing and RCU">Tracing and RCU</a></h3>
 <p>
 It is possible to use tracing on RCU code, but tracing itself
 uses RCU.
-For this reason, <tt>rcu_dereference_raw_check()</tt>
+For this reason, <tt>rcu_dereference_raw_notrace()</tt>
 is provided for use by tracing, which avoids the destructive
 recursion that could otherwise ensue.
 This API is also used by virtualization in some architectures,