rcu: Switch callers from rcu_process_gp_end() to note_gp_changes()

Because note_gp_changes() now incorporates rcu_process_gp_end() function,
this commit switches to the former and eliminates the latter.  In
addition, this commit changes external calls from __rcu_process_gp_end()
to __note_gp_changes().

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Git-commit: 470716fc043aba2fea832334e58d5cd5d82288a3
Signed-off-by: Kishan Kumar <kishank@codeaurora.org>