mmc: sdio: Return ret if sdio_disable_func() fails

We should return any possible error returned by mmc_io_rw_direct()
rather than only -EIO in sdio_disable_func() failure path.

Signed-off-by: Yue Hu <huyue2@yulong.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20200604100102.13572-1-zbestahu@gmail.com


Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>