MAINTAINERS: add Stephen Boyd as clk co-maintainer
MAINTAINERS: add Stephen Boyd as clk co-maintainer

Signed-off-by: Michael Turquette <6dab61939fc5e23761050a66932f032dceda5ebf@linaro.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs