powerpc/T4240EMU: Add T4240EMU target

Add emulator support for T4240. Emulator has limited peripherals and
interfaces. Difference between emulator and T4240QDS includes:
	ECC for DDR is disabled due the procedure to load images
	No board FPGA (QIXIS)
	NOR flash has 32-bit port for higher loading speed
	IFC and I2C timing don't really matter, so set them fast
	No ethernet

Signed-off-by: York Sun <yorksun@freescale.com>
diff --git a/board/freescale/t4qds/Makefile b/board/freescale/t4qds/Makefile
index 85df066..a2167b3 100644
--- a/board/freescale/t4qds/Makefile
+++ b/board/freescale/t4qds/Makefile
@@ -8,7 +8,8 @@
 
 LIB	= $(obj)lib$(BOARD).o
 
-COBJS-y	+= $(BOARD).o
+COBJS-$(CONFIG_T4240QDS) += t4240qds.o
+COBJS-$(CONFIG_T4240EMU) += t4240emu.o
 COBJS-y	+= ddr.o
 COBJS-$(CONFIG_T4240QDS)+= eth.o
 COBJS-$(CONFIG_PCI)	+= pci.o