clk: samsung: dt-bindings: Put CLK_UART3 in order

Order the CLK_UART3 by ID.  No change in functionality.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>