rcu: Kconfig help needs to say that TREE_PREEMPT_RCU scales down
rcu: Kconfig help needs to say that TREE_PREEMPT_RCU scales down

To quote Valdis:

    This leaves somebody who has a laptop wondering which
    choice is best for a system with only one or two cores that
    has CONFIG_PREEMPT defined. One choice says it scales down
    nicely, the other explicitly has a 'depends on PREEMPT'
    attached to it...

So add "scales down nicely" to TREE_PREEMPT_RCU to match that of
TREE_RCU.

Suggested-by: Valdis Kletnieks <183bdd1d6873c97a167cc4b441324ddf7a94dd06@vt.edu>
Signed-off-by: Paul E. McKenney <1e0ce936bb9b355d257bf5790d2513c3f28be22b@linux.vnet.ibm.com>
Cc: 4c9eb49378914b743bdd32292c04df29b820d73e@cn.fujitsu.com
Cc: a6f1be4247cea11e3150b15872843079f20d7078@in.ibm.com
Cc: 5c1e68b099950c134891f0b6e179498a8ebe9cf9@linux-foundation.org
Cc: 007bef6a47fb57dff675bfa1b0b798b4bdfbfc25@polymtl.ca
Cc: c028c213ed5efcf30c3f4fc7361dbde0c893c5b7@joshtriplett.org
Cc: 6620bce6bfb8b2ba8b188f43804848d35a9a4d76@us.ibm.com
Cc: a103ef9226f51cd1e5e835b2f74c82dfb33d1ccb@us.ibm.com
Cc: 3fddac958924aef220f202ca567388ddab3f14a8@infradead.org
Cc: 43232e92d70cc7aa53504ad0397085ee47bad87f@goodmis.org
LKML-Reference: <12528585112362-git-send-email->
Signed-off-by: Ingo Molnar <9dbbbf0688fedc85ad4da37637f1a64b8c718ee2@elte.hu>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas