arm64: dts: amlogic: ad402: move thermal-zones to top node

arm64: dts: amlogic: ad402: move thermal-zones to top node

It appears that this accidentally got added into the spi node, causing
a warning.

arch/arm64/boot/dts/amlogic/meson-a1-ad402.dts:119.16-161.4: Warning (spi_bus_reg): /soc/spi@fd000400/thermal-zones: missing or empty reg property

Fixes: 593ab951232b ("arm64: dts: amlogic: ad402: setup thermal-zones")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20240528133215.2266419-1-arnd@kernel.org
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>