dmaengine: timb_dma: fix spelling mistake: "Couldnt" -> "Couldn't"

Trivial fix to spelling mistake in dev_err error message text.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

drivers/dma/timb_dma.c

@@ -422,7 +422,7 @@ static int td_alloc_chan_resources(struct dma_chan *chan)
 				break;
 			else {
 				dev_err(chan2dev(chan),
-					"Couldnt allocate any descriptors\n");
+					"Couldn't allocate any descriptors\n");
 				return -ENOMEM;
 			}
 		}