mmc: core: remove unused host parameter of mmc_sd_get_csd()

The host parameter is not used in the body of mmc_sd_get_csd(),
so let's remove it. Update related code at the same time.

Signed-off-by: Yue Hu <huyue2@yulong.com>
Link: https://lore.kernel.org/r/20210118084520.241-1-zbestahu@gmail.com


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