dra7xx: Add dra72_evm_defconfig using CONFIG_DM

- Import various DT files for DRA7 / DR72x / dra72-evm from Linux Kernel
  v4.1
- Add config file for this board, enable DM and DM_GPIO

Cc: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/serial/serial_omap.c b/drivers/serial/serial_omap.c
index 265fe00..325fe42 100644
--- a/drivers/serial/serial_omap.c
+++ b/drivers/serial/serial_omap.c
@@ -15,6 +15,7 @@
 #ifdef CONFIG_OF_CONTROL
 static const struct udevice_id omap_serial_ids[] = {
 	{ .compatible = "ti,omap3-uart" },
+	{ .compatible = "ti,omap4-uart" },
 	{ }
 };