bcm968380gerg: add initial support

This add the initial support of the broadcom reference
board bcm968380gerg with a bcm68380 SoC.

This board has 512 MB of RAM, 128 MB of flash (nand),
2 USB port, 1 UART, 4 ethernet ports and BCM43217 (wifi).

Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
diff --git a/arch/mips/dts/brcm,bcm968380gerg.dts b/arch/mips/dts/brcm,bcm968380gerg.dts
new file mode 100644
index 0000000..513045e
--- /dev/null
+++ b/arch/mips/dts/brcm,bcm968380gerg.dts
@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018 Philippe Reynes <philippe.reynes@softathome.com>
+ */
+
+/dts-v1/;
+
+#include "brcm,bcm6838.dtsi"
+
+/ {
+	model = "Broadcom bcm68380gerg";
+	compatible = "broadcom,bcm68380gerg", "brcm,bcm6838";
+
+	aliases {
+		serial0 = &uart0;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+};
+
+&memory {
+	force-size = <0x10000000>;
+};
+
+&uart0 {
+	u-boot,dm-pre-reloc;
+	status = "okay";
+};
+
+&leds {
+	status = "okay";
+
+	led@0 {
+		reg = <0>;
+		active-low;
+		label = "bcm968380gerg:green:usb";
+	};
+};