locking,x86: Kill atomic_or_long()

commit f6b4ecee upstream.

There are no users, kill it.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Jesse Brandeburg <jesse.brandeburg@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/20140508135851.768177189@infradead.org


Signed-off-by: Ingo Molnar <mingo@kernel.org>
[bwh: Backported to 3.16 because this function is broken after
 "x86/atomic: Fix smp_mb__{before,after}_atomic()"]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>