am335x: sl50: Add Device Tree Support and DM_MMC driver

This adds device tree and the DM_MMC driver for the SL50 board.

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 2f31091..4b4bd80 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -193,7 +193,8 @@
 	am335x-pxm50.dtb \
 	am335x-rut.dtb \
 	am335x-pdu001.dtb \
-	am335x-chiliboard.dtb
+	am335x-chiliboard.dtb \
+	am335x-sl50.dtb
 dtb-$(CONFIG_AM43XX) += am437x-gp-evm.dtb am437x-sk-evm.dtb	\
 	am43x-epos-evm.dtb \
 	am437x-idk-evm.dtb \