clk: Add devm_clk_{register,unregister}()
Some clock drivers can be simplified if devres takes care of unregistering any registered clocks along error paths. Introduce devm_clk_register() so that clock drivers get unregistration for free along with simplified error paths. Signed-off-by: NStephen Boyd <sboyd@codeaurora.org> Signed-off-by: NMike Turquette <mturquette@linaro.org>
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