dmaengine: omap-dma: Add more debug information when freeing channel

Print the same information the driver prints when allocating the channel
resources regarding to the sDMA channel.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
diff --git a/drivers/dma/omap-dma.c b/drivers/dma/omap-dma.c
index 774306d..e58eda5 100644
--- a/drivers/dma/omap-dma.c
+++ b/drivers/dma/omap-dma.c
@@ -568,7 +568,8 @@
 	vchan_free_chan_resources(&c->vc);
 	omap_free_dma(c->dma_ch);
 
-	dev_dbg(od->ddev.dev, "freeing channel for %u\n", c->dma_sig);
+	dev_dbg(od->ddev.dev, "freeing channel %u used for %u\n", c->dma_ch,
+		c->dma_sig);
 	c->dma_sig = 0;
 }