dmaengine: at_xdmac: fix resume for cyclic transfers

dmaengine: at_xdmac: fix resume for cyclic transfers

BugLink: http://bugs.launchpad.net/bugs/1553179
commit 611dcadb01c89d1d3521450c05a4ded332e5a32d upstream.

When having cyclic transfers, the channel was paused when performing
suspend but was not correctly resumed.

Signed-off-by: Songjun Wu <songjun.wu@atmel.com>
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Fixes: e1f7c9eee707 ("dmaengine: at_xdmac: creation of the atmel eXtended DMA Controller driver")
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>