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89ac8d7ae1
At some point changes to clk_set_rate and clk_set_parent introduced a bug whereby NULL struct clk pointers were treated as an error. This is in violation of the API in include/linux/clk.h. Reintroduce graceful handling of NULL clk's by bailing from clk_set_rate and clk_set_parent with return codes of zero. Signed-off-by: Mike Turquette <mturquette@linaro.org>