powerpc: Fix irq_set_affinity() return values

Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/sysdev/ehv_pic.c b/arch/powerpc/sysdev/ehv_pic.c
index 6e0e100..9cd0e60 100644
--- a/arch/powerpc/sysdev/ehv_pic.c
+++ b/arch/powerpc/sysdev/ehv_pic.c
@@ -81,7 +81,7 @@
 	ev_int_set_config(src, config, prio, cpuid);
 	spin_unlock_irqrestore(&ehv_pic_lock, flags);
 
-	return 0;
+	return IRQ_SET_MASK_OK;
 }
 
 static unsigned int ehv_pic_type_to_vecpri(unsigned int type)