spi: dw: export dw_spi_set_cs
Export dw_spi_set_cs so it can be used from the various IP integration modules. Signed-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com> Reviewed-by: NAndy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: NMark Brown <broonie@kernel.org>
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