soundwire: cadence: Fix error check in cdns_xfer_msg()

_cdns_xfer_msg() returns an sdw_command_response value, not a
negative error code.
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20220917154822.690472-1-rf@opensource.cirrus.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/soundwire/cadence_master.c

@@ -708,7 +708,7 @@ cdns_xfer_msg(struct sdw_bus *bus, struct sdw_msg *msg)
 	for (i = 0; i < msg->len / CDNS_MCP_CMD_LEN; i++) {
 		ret = _cdns_xfer_msg(cdns, msg, cmd, i * CDNS_MCP_CMD_LEN,
 				     CDNS_MCP_CMD_LEN, false);
-		if (ret < 0)
+		if (ret != SDW_CMD_OK)
 			goto exit;
 	}