MLK-15305-2: dma: imx-sdma: force to load context in sdma_config

Force to load context in sdma_config whatever context loaded or not,
since some configuration may change when the upper driver call sdma_config
such as bus width.

Signed-off-by: Robin Gong <yibin.gong@nxp.com>
(cherry picked from commit ee8930b657af0c9ce2cfb1a521530c7d31016675)

drivers/dma/imx-sdma.c

@@ -1168,6 +1168,8 @@ static int sdma_config_channel(struct dma_chan *chan)
 		sdmac->watermark_level = 0; /* FIXME: M3_BASE_ADDRESS */
 	}
 
+	sdmac->context_loaded = false;
+
 	ret = sdma_load_context(sdmac);
 
 	return ret;