ppc4xx: Add PPC405EX support

Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/cpu/ppc4xx/Makefile b/cpu/ppc4xx/Makefile
index a11faec..bc65aa0 100644
--- a/cpu/ppc4xx/Makefile
+++ b/cpu/ppc4xx/Makefile
@@ -30,7 +30,7 @@
 COBJS	= 40x_spd_sdram.o 44x_spd_ddr.o 44x_spd_ddr2.o \
 	  4xx_pci.o 4xx_pcie.o 4xx_enet.o \
 	  bedbug_405.o commproc.o \
-	  cpu.o cpu_init.o gpio.o i2c.o interrupts.o \
+	  cpu.o cpu_init.o fdt.o gpio.o i2c.o interrupts.o \
 	  miiphy.o ndfc.o sdram.o serial.o speed.o \
 	  tlb.o traps.o usb_ohci.o usb.o usbdev.o