dt-bindings: clock: Add TMU clock ID to Exynos5410

Add ID for TMU clock to Exynos5410. Use the same number as for
Exynos5420 just in case in future these drivers were merged.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>