mmc: dw_mmc: Extract DMA transfer handling code into a separate routine

Make dwmci_send_cmd() easier to read by moving the DMA transfer handling
code into a dedicated function.

No functional change.

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
1 file changed