ARM: omap3: am3517-evm: Add device tree and DM support

With the device tree ported from Linux 4.13, this enables
Driver Model and Device Tree support for the am3517-evm

Signed-off-by: Adam Ford <aford173@gmail.com>
Tested-by: Derald D. Woods <woods.technical@gmail.com>
diff --git a/arch/arm/mach-omap2/omap3/Kconfig b/arch/arm/mach-omap2/omap3/Kconfig
index 11f5f05..4dbf9a2 100644
--- a/arch/arm/mach-omap2/omap3/Kconfig
+++ b/arch/arm/mach-omap2/omap3/Kconfig
@@ -22,6 +22,11 @@
 
 config TARGET_AM3517_EVM
 	bool "AM3517 EVM"
+	select DM
+	select DM_SERIAL
+	select DM_GPIO
+	select DM_I2C
+	select DM_MMC
 
 config TARGET_MT_VENTOUX
 	bool "TeeJet Mt.Ventoux"