clk/exynos5420: add gate clock for mixer sysmmu

Adding sysmmu clock for mixer for exynos5420.

Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Acked-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2 files changed