rockchip: Use the same boot_targets for all boards

It doesn't really matter if we mention things which are not present. For
example, if 'nvme' is included but the board does not support it, it just
continues with the next item in the list.

It is simpler to use the same target list for all boards, so drop the
different one for rk3399.

Signed-off-by: Simon Glass <sjg@chromium.org>
1 file changed