arm64: dts: meson-g12: add ATF BL32 reserved-memory region

[ Upstream commit 08982a1b

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Add an additional reserved memory region for the BL32 trusted firmware
present in many devices that boot from Amlogic vendor u-boot.

Signed-off-by: Christian Hewitt <christianshewitt@gmail.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://lore.kernel.org/r/20220126044954.19069-3-christianshewitt@gmail.com


Signed-off-by: Sasha Levin <sashal@kernel.org>