clk: samsung: MAINTAINERS: add Krzysztof Kozlowski

Add Krzysztof Kozlowski (already Samsung SoC maintainer) as Samsung SoC
clock maintainer to handle the patches.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Link: https://lore.kernel.org/r/20220823073154.359090-1-krzysztof.kozlowski@linaro.org