bcm968580xref: add initial support

This add the initial support of the broadcom reference
board bcm968580xref with a bcm6858 SoC.

This board has 512 MB of ram, 256 MB of flash (nand),
2 usb port, 1 uart, 4 ethernet ports (LAN), 1 ethernet port (WAN).

Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com>
diff --git a/board/broadcom/bcm968580xref/MAINTAINERS b/board/broadcom/bcm968580xref/MAINTAINERS
new file mode 100644
index 0000000..1ecdfbc
--- /dev/null
+++ b/board/broadcom/bcm968580xref/MAINTAINERS
@@ -0,0 +1,6 @@
+BROADCOM BCM968580XREF
+M:	Philippe Reynes <philippe.reynes@softathome.com>
+S:	Maintained
+F:	board/broadcom/bcm968580xref/
+F:	include/configs/broadcom_bcm968580xref.h
+F:	configs/bcm968580_ram_defconfig