dmaeninge: xilinx_dma: Fix bug in multiple frame stores scenario in vdma

dmaeninge: xilinx_dma: Fix bug in multiple frame stores scenario in vdma

When VDMA is configured for more than one frame in the h/w.
For example h/w is configured for n number of frames, user
Submits n number of frames and triggered the DMA using issue_pending API.

In the current driver flow we are submitting one frame at a time,
But we should submit all the n number of frames at one time
As the h/w is configured for n number of frames.

This patch fixes this issue.

Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Jose Abreu <joabreu@synopsys.com>
Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>