Revert "mmc: tmio: remove workaround for NON_REMOVABLE"

This reverts commit 7a7dab23. We found
out that there is still a race with RuntimePM. This can lead to a hang
when accessing the eMMC in some situations. Revert this change until the
RPM issue is fixed.

Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>