dmaengine i.MX SDMA: do not initialize chan_id field

This is bogus as the dmaengine core will overwrite this field.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index 8707723..3e848ee 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -1307,7 +1307,6 @@
 		dma_cap_set(DMA_CYCLIC, sdma->dma_device.cap_mask);
 
 		sdmac->chan.device = &sdma->dma_device;
-		sdmac->chan.chan_id = i;
 		sdmac->channel = i;
 
 		/* Add the channel to the DMAC list */