mmc: tmio: remove indirection of 'hw_reset' callback

mmc: tmio: remove indirection of 'hw_reset' callback

After Yamada-san's refactorization introducing 'tmio_mmc_host_alloc', we
can populate mmc_ops directly and don't need a layer inbetween.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/20200820132538.24758-4-wsa+renesas@sang-engineering.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>