mmc: of_mmc_spi: fix unused warning
drivers/mmc/host/of_mmc_spi.c: In function 'mmc_spi_get_pdata': drivers/mmc/host/of_mmc_spi.c:77:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable] int ret = -EINVAL; ^ Signed-off-by: NBrian Norris <computersforpeace@gmail.com> Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>
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