The "oprofile" user-space tools don't use the kernel OPROFILE support
any more, and haven't in a long time. User-space has been converted to
the perf interfaces.

Remove kernel's old oprofile support.
Suggested-by: NChristoph Hellwig <hch@infradead.org>
Suggested-by: NLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: NViresh Kumar <viresh.kumar@linaro.org>
Acked-by: NRobert Richter <rric@kernel.org>
Acked-by: Paul E. McKenney <paulmck@kernel.org> #RCU
Acked-by: NWilliam Cohen <wcohen@redhat.com>
Acked-by: NAl Viro <viro@zeniv.linux.org.uk>
Acked-by: NThomas Gleixner <tglx@linutronix.de>