frv: Define cpu_relax_lowlatency()
3a6bfbc9 "(arch,locking: Ciao arch_mutex_cpu_relax()") broke building the frv arch. Fixes errors such as: kernel/locking/mcs_spinlock.h:87:2: error: implicit declaration of function 'cpu_relax_lowlatency' Signed-off-by: NDavidlohr Bueso <davidlohr@hp.com> Compile-tested-by: NGuenter Roeck <linux@roeck-us.net> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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