perf: Remove the nmi parameter from the oprofile_perf backend

In commit a8b0ca17 ("perf: Remove the nmi parameter from the
swevent and overflow interface") one site was overlooked.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20110708173442.GB31972@e102144-lin.cambridge.arm.com


Signed-off-by: Ingo Molnar <mingo@elte.hu>