dmaengine: sirf: fix a typo in dma_prep_interleaved

either DEV_TO_MEM or MEM_TO_DEV is supported, so change
OR to AND.

Signed-off-by: Barry Song <Baohua.Song@csr.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>