[POWERPC] arch/powerpc/sysdev/mpic.c of_node_get cleanup

No need for ?: because of_node_get() can handle NULL argument.

Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index d01ced1..62262f2 100644
--- a/arch/powerpc/sysdev/mpic.c
+++ b/arch/powerpc/sysdev/mpic.c
@@ -912,7 +912,7 @@
 	
 	memset(mpic, 0, sizeof(struct mpic));
 	mpic->name = name;
-	mpic->of_node = node ? of_node_get(node) : NULL;
+	mpic->of_node = of_node_get(node);
 
 	mpic->irqhost = irq_alloc_host(IRQ_HOST_MAP_LINEAR, 256,
 				       &mpic_host_ops,