clocksource/drivers/rockchip_timer: Convert init function to return error
The init functions do not return any error. They behave as the following: - panic, thus leading to a kernel crash while another timer may work and make the system boot up correctly or - print an error and let the caller unaware if the state of the system Change that by converting the init functions to return an error conforming to the CLOCKSOURCE_OF_RET prototype. Proper error handling (rollback, errno value) will be changed later case by case, thus this change just return back an error or success in the init function. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Reviewed-by: Heiko Stuebner <heiko@sntech.de> on a rk3399-evb Tested-by: Heiko Stuebner <heiko@sntech.de>
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