powerpc/85xx: Fix compilation of mpc85xx_mds.c

Commit 99d8238f berobbed the for_each loop of its iterator! Let's be
nice and give it back, so it compiles for us.

CC: Anton Vorontsov <[e-mail]>
Signed-off-by: Alexander Graf <[e-mail]>
Signed-off-by: Kumar Gala <[e-mail]>

arch/powerpc/platforms/85xx/mpc85xx_mds.c

···
 {
 #ifdef CONFIG_PCI
 	struct pci_controller *hose;
+	struct device_node *np;
 #endif
 	dma_addr_t max = 0xffffffff;