[POWERPC] spufs: fix spu irq affinity setting

This changes the hypervisor abstraction of setting cpu affinity to a
higher level to avoid platform dependent interrupt controller
routines.  I replaced spu_priv1_ops:spu_int_route_set() with a
new routine spu_priv1_ops:spu_cpu_affinity_set().

As a by-product, this change eliminated what looked like an
existing bug in the set affinity code where spu_int_route_set()
mistakenly called int_stat_get().

Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/include/asm-powerpc/spu_priv1.h b/include/asm-powerpc/spu_priv1.h
index cb87d1f..300c458 100644
--- a/include/asm-powerpc/spu_priv1.h
+++ b/include/asm-powerpc/spu_priv1.h
@@ -33,7 +33,7 @@
 	u64 (*int_mask_get) (struct spu *spu, int class);
 	void (*int_stat_clear) (struct spu *spu, int class, u64 stat);
 	u64 (*int_stat_get) (struct spu *spu, int class);
-	void (*int_route_set) (struct spu *spu, u64 route);
+	void (*cpu_affinity_set) (struct spu *spu, int cpu);
 	u64 (*mfc_dar_get) (struct spu *spu);
 	u64 (*mfc_dsisr_get) (struct spu *spu);
 	void (*mfc_dsisr_set) (struct spu *spu, u64 dsisr);
@@ -88,9 +88,9 @@
 }
 
 static inline void
-spu_int_route_set (struct spu *spu, u64 route)
+spu_cpu_affinity_set (struct spu *spu, int cpu)
 {
-	spu_priv1_ops->int_stat_get(spu, route);
+	spu_priv1_ops->cpu_affinity_set(spu, cpu);
 }
 
 static inline u64