spi: spi-cadence-quadspi: Fix missing unwind goto warnings

The following smatch warnings [0] were recently introduced:

drivers/spi/spi-cadence-quadspi.c:1882 cqspi_probe() warn: missing
unwind goto?

Fix these warnings by releasing dma channel and adding a goto fail probe.

[0] https://lore.kernel.org/all/[email protected]/

Fixes: 0578a6d ("spi: spi-cadence-quadspi: add runtime pm support")
Reported-by: kernel test robot <[email protected]>
Reported-by: Dan Carpenter <[email protected]>
Closes: https://lore.kernel.org/r/[email protected]/
Signed-off-by: Dhruva Gole <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>

Author: DhruvaG2000

drivers/spi/spi-cadence-quadspi.c

@@ -1878,8 +1878,11 @@ static int cqspi_probe(struct platform_device *pdev)
 	}
 
 	ret = devm_pm_runtime_enable(dev);
-	if (ret)
-		return ret;
+	if (ret) {
+		if (cqspi->rx_chan)
+			dma_release_channel(cqspi->rx_chan);
+		goto probe_setup_failed;
+	}
 
 	pm_runtime_set_autosuspend_delay(dev, CQSPI_AUTOSUSPEND_TIMEOUT);
 	pm_runtime_use_autosuspend(dev);