[POWERPC] 83xx: Suppress warning when CONFIG_PCI is not defined

Suppress warning when CONFIG_PCI is not defined.

Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/arch/powerpc/platforms/83xx/mpc834x_mds.c b/arch/powerpc/platforms/83xx/mpc834x_mds.c
index 8aa9a93..10394b2 100644
--- a/arch/powerpc/platforms/83xx/mpc834x_mds.c
+++ b/arch/powerpc/platforms/83xx/mpc834x_mds.c
@@ -120,7 +120,9 @@
  */
 static void __init mpc834x_mds_setup_arch(void)
 {
+#ifdef CONFIG_PCI
 	struct device_node *np;
+#endif
 
 	if (ppc_md.progress)
 		ppc_md.progress("mpc834x_mds_setup_arch()", 0);