mmc: rtsx: Fix build errors/warnings for unused variable

commit 3dd9a926 upstream.

The struct device *dev, is no longer needed at various functions, let's
therefore drop it to fix the build errors/warnings.

Fixes: 7570fb41

 ("mmc: rtsx: Let MMC core handle runtime PM")
Cc: Kai-Heng Feng <kai.heng.feng@canonical.com>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20220301115300.64332-1-ulf.hansson@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>