omap3: igep00x0: Add Device Tree Support and DM_MMC driver

This adds device tree for OMAP3 IGEP based boards and the DM_MMC driver.

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/dts/omap3-igep0020-u-boot.dtsi b/arch/arm/dts/omap3-igep0020-u-boot.dtsi
new file mode 100644
index 0000000..41beaf0
--- /dev/null
+++ b/arch/arm/dts/omap3-igep0020-u-boot.dtsi
@@ -0,0 +1,24 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * U-Boot additions
+ *
+ * (C) Copyright 2017 Derald D. Woods <woods.technical@gmail.com>
+ */
+
+/ {
+	chosen {
+		stdout-path = &uart3;
+	};
+};
+
+&uart1 {
+	reg-shift = <2>;
+};
+
+&uart2 {
+	reg-shift = <2>;
+};
+
+&uart3 {
+	reg-shift = <2>;
+};