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It's possible that mmc_of_parse() could return errors (possibly in
some future version it might return -EPROBE_DEFER even).  Let's pass
those errors back.
Signed-off-by: Doug Anderson <dianders@chromium.org>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>