mx51evk: Convert to driver model

Make the conversion to driver model as it is mandatory.

Tested booting the Linux kernel from the SD card.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index b28d179..2321c94 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -651,6 +651,9 @@
 dtb-$(CONFIG_MX28) += \
 	imx28-xea.dtb
 
+dtb-$(CONFIG_MX51) += \
+	imx51-babbage.dtb
+
 dtb-$(CONFIG_MX53) += imx53-cx9020.dtb \
 	imx53-qsb.dtb \
 	imx53-kp.dtb \