arm64: dts: exynos: remove unused TMU alias

The ID of this alias is checked by the exynos-tmu driver, but isn't used
anywhere and omitting it does not cause an error. Indeed, this is the
only Exynos device that defines this alias.

Signed-off-by: Mateusz Majewski <m.majewski2@samsung.com>
Link: https://lore.kernel.org/r/20230911133342.14028-1-m.majewski2@samsung.com


Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>