board: ti: am654: a53: Add initial support for am654

Add initial support for AM654 based EVM running on A53. Enable
4GB of DDR available on the EVM so that kernel DTB file
can be updated accordingly.

Reviewed-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
[Andreas: Added 4GB ddr support]
Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
diff --git a/board/ti/am65x/MAINTAINERS b/board/ti/am65x/MAINTAINERS
new file mode 100644
index 0000000..c5921b4
--- /dev/null
+++ b/board/ti/am65x/MAINTAINERS
@@ -0,0 +1,5 @@
+AM65x BOARD
+M:	Lokesh Vutla <lokeshvutla@ti.com>
+S:	Maintained
+F:	board/ti/am65x/
+F:	include/configs/am65x_evm.h