cpufreq: sun50i: Switch to use dev_err_probe() helper
In the probe path, convert pr_err() to dev_err_probe() which will check if error code is -EPROBE_DEFER and prints the error name. It also sets the defer probe reason which can be checked later through debugfs. It's more simple in error path. Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
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