dmatest: move src_off, dst_off, len inside loop

The scope of those varsiables is in while-loop. This patch moves them there and
removes duplicate code.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
1 file changed