mmc: alcor: Use str_read_write() helper
Remove hard-coded strings by using the str_read_write() helper.
Signed-off-by: Feng Wei <feng.wei8@zte.com.cn>
Signed-off-by: Shao Mingyin <shao.mingyin@zte.com.cn>
Link: https://lore.kernel.org/r/20250401195751834zbm34YDvwPeQf7ooZBCdh@zte.com.cn
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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