mmc: dw_mmc: Don't return error if data busy timeout

As described in [1], some poor hardware or cards would fail to release
the bus and keep driving data lines low. Ignore it and send the next cmd
directly seems okay for most cases.

[1]: https://patchwork.kernel.org/project/linux-mmc/patch/1424458179-5456-1-git-send-email-dianders@chromium.org/

Signed-off-by: Yang Xiwen <forbidden405@outlook.com>
Tested-by: Jaehoon Chung <jh80.chung@samsung.com>
1 file changed