meson-a1: dts: add ao secure node

ao-secure node can be used to get information about the board,
so, for example, using show_board_info() we can get following
information for board with Meson A1 SoC:

SoC: Amlogic Meson A1 (A113L) Revision 2c:a (1:a)

Signed-off-by: Alexey Romanov <avromanov@salutedevices.com>
Link: https://lore.kernel.org/r/20231010100623.74475-3-avromanov@salutedevices.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
1 file changed