powerpc: Move openpic_intr, since it's hidden now

Last minute change by me (diff reduction), that I didn't build.  This
was in the original commit.

Fixes:		8fb1789612 ("intr/powerpc: create openpic_class kobj")
MFC after:	2 weeks
X-MFC-with:	8fb1789612

sys/powerpc/powerpc/openpic.c

@@ -280,17 +280,6 @@ openpic_config(device_t dev, u_int irq, enum intr_trigger trig,
 	openpic_write(sc, OPENPIC_SRC_VECTOR(irq), x);
 }
 
-static int
-openpic_intr(void *arg)
-{
-	device_t dev = (device_t)(arg);
-
-	/* XXX Cascaded PICs do not pass non-NULL trapframes! */
-	openpic_dispatch(dev, NULL);
-
-	return (FILTER_HANDLED);
-}
-
 static void
 openpic_dispatch(device_t dev, struct trapframe *tf)
 {
@@ -311,6 +300,17 @@ openpic_dispatch(device_t dev, struct trapframe *tf)
 	}
 }
 
+static int
+openpic_intr(void *arg)
+{
+	device_t dev = (device_t)(arg);
+
+	/* XXX Cascaded PICs do not pass non-NULL trapframes! */
+	openpic_dispatch(dev, NULL);
+
+	return (FILTER_HANDLED);
+}
+
 void
 openpic_enable(device_t dev, u_int irq, u_int vector, void **priv __unused)
 {