mmc: tmio: remove dma_ops from tmio_mmc_host_probe() argument

Drivers need to set up various struct members for tmio_mmc_host before
calling tmio_mmc_host_probe().  Do likewise for host->dma_ops instead
of passing it as a function argument.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>