linux-phytec-fsl

MLK-11344-5: dmaengine: imx: fix loop mode issue

cherry-pick below patch from v3.14.y:

ENGR00329822-01 dmaengine: imx: fix loop mode issue

Fix loop mode issue that calling dmaengine_tx_status() can get
right state.residue value.

Signed-off-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: Robin Gong <b38343@freescale.com>
(cherry picked from commit 37e17f10b35c34317def08704e4b4edf5aa23894)
(cherry picked from commit 00cc7021317ac6efb460eb1b9bc3bd8aa6ad73c2)