dmaengine: ti: k3-udma: Fix fall-through warning for Clang

Fix the following fallthrough warning:

drivers/dma/ti/k3-udma.c:4951:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough]
Reported-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>

drivers/dma/ti/k3-udma.c

@@ -4948,6 +4948,7 @@ static int setup_resources(struct udma_dev *ud)
 						       ud->tchan_cnt),
 			 ud->rchan_cnt - bitmap_weight(ud->rchan_map,
 						       ud->rchan_cnt));
+		break;
 	default:
 		break;
 	}