clk: exynos5433: Mark some clocks as critical

clk: exynos5433: Mark some clocks as critical

Some parent clocks of the Exynos5433 CMUs must be always enabled to access
any register in the given CMU or devices connected to it. For the time
being, until a proper solution based on runtime PM is applied, mark those
clocks as critical (instead of ignore unused) to prevent disabling them.

Change-Id: Icf0955a6a357acd90865512d326da04974ba9ed9
Reported-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Tested-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
[cw00.choi: Apply mainline patch as backporting]
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>