sparc: Restore irq_trans_init() call in prom_create_node().

This broke sparc64 in various ways.

Add an empty dummy hook in sparc32's prom_32.c so that we
can potentially handle things on that side similarly, and
in particular avoid a prom_common.c ifdef :-)

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/kernel/prom_32.c b/arch/sparc/kernel/prom_32.c
index f21e8fc..fe43e80 100644
--- a/arch/sparc/kernel/prom_32.c
+++ b/arch/sparc/kernel/prom_32.c
@@ -289,3 +289,7 @@
 void __init of_fill_in_cpu_data(void)
 {
 }
+
+void __init irq_trans_init(struct device_node *dp)
+{
+}