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/board/broadcom/bcm968380gerg/Makefile b/board/broadcom/bcm968380gerg/Makefile
new file mode 100644
index 0000000..a525b7b
--- /dev/null
+++ b/board/broadcom/bcm968380gerg/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0+
+
+obj-y += bcm968380gerg.o