arm64: dts: amlogic: ad402: fix thermal zone node name

arm64: dts: amlogic: ad402: fix thermal zone node name

Fixes the following:
thermal-zones: 'soc_thermal' does not match any of the regexes: '^[a-zA-Z][a-zA-Z0-9\\-]{1,12}-thermal$', 'pinctrl-[0-9]+'
        from schema $id: http://devicetree.org/schemas/thermal/thermal-zones.yaml#

Fixes: 593ab951232b ("arm64: dts: amlogic: ad402: setup thermal-zones")
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240624-topic-amlogic-upstream-bindings-fixes-dts-round-2-v1-1-0a21f456eb8d@linaro.org
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>