ASoC: soc-core: use DEVICE_ATTR_RO macro
Use DEVICE_ATTR_RO helper instead of plain DEVICE_ATTR, which makes the code a bit shorter and easier to read. Signed-off-by: YueHaibing <yuehaibing@huawei.com> Link: https://lore.kernel.org/r/20210514081100.16196-1-yuehaibing@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
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