mx28evk: Convert to driver model

Make the conversion to driver model as it is mandatory.

Successfully tested booting Linux from the SD card.

Dropped support for networking and splash screen as these need
to be properly converted to DM and tested.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index bec349f..e62f7fc 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -680,6 +680,7 @@
 	imx23-olinuxino.dtb
 
 dtb-$(CONFIG_MX28) += \
+	imx28-evk.dtb \
 	imx28-xea.dtb
 
 dtb-$(CONFIG_MX51) += \