[SPARC32]: Fix SMP build regression

commit b19cbe2a16 [BRIDGE]: Fix fdb RCU
race

breaks sparc SMP build because atomic_add_unless is not exported.

This patch exports atomic_add_unless and atomic_cmpxchg.

Signed-off-by: Robert Reif <reif@earthlink.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc/lib/atomic32.c

@@ -52,6 +52,7 @@ int atomic_cmpxchg(atomic_t *v, int old, int new)
 	spin_unlock_irqrestore(ATOMIC_HASH(v), flags);
 	return ret;
 }
+EXPORT_SYMBOL(atomic_cmpxchg);
 
 int atomic_add_unless(atomic_t *v, int a, int u)
 {
@@ -65,6 +66,7 @@ int atomic_add_unless(atomic_t *v, int a, int u)
 	spin_unlock_irqrestore(ATOMIC_HASH(v), flags);
 	return ret != u;
 }
+EXPORT_SYMBOL(atomic_add_unless);
 
 /* Atomic operations are already serializing */
 void atomic_set(atomic_t *v, int i)