mx23evk: Convert to driver model

Make the conversion to driver model as it is mandatory.

Successfully tested booting Linux from the SD card.

Dropped splash screen support as this needs 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 2321c94..a8215ca 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -648,6 +648,9 @@
 	vf610-pcm052.dtb \
 	vf610-bk4r1.dtb
 
+dtb-$(CONFIG_MX23) += \
+	imx23-evk.dtb
+
 dtb-$(CONFIG_MX28) += \
 	imx28-xea.dtb