tests: dma: update dma loop transfer app

Update the dma loop transfer sample app to use the new
dma api interfaces. This change is based on the api change
and the updated dma driver.

A RFC was posted recently on this.

Jira: ZEP-873

Change-Id: I289e2e08d4c775a833bf3d585d2706a903edd0bc
Signed-off-by: Baohong Liu <baohong.liu@intel.com>