[POWERPC] arch/powerpc/sysdev/ipic.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/ipic.c b/arch/powerpc/sysdev/ipic.c
index 746f78c..522aa14 100644
--- a/arch/powerpc/sysdev/ipic.c
+++ b/arch/powerpc/sysdev/ipic.c
@@ -569,7 +569,7 @@
 		return;
 
 	memset(ipic, 0, sizeof(struct ipic));
-	ipic->of_node = node ? of_node_get(node) : NULL;
+	ipic->of_node = of_node_get(node);
 
 	ipic->irqhost = irq_alloc_host(IRQ_HOST_MAP_LINEAR,
 				       NR_IPIC_INTS,