spi: mpc5xxx-psc: Return immediately if IRQ resource is unavailable

Return immediately if IRQ resource is unavailable. This will also
propagate the correct error code in such cases.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230306183115.87314-3-andriy.shevchenko@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-mpc512x-psc.c

@@ -490,6 +490,9 @@ static int mpc512x_psc_spi_of_probe(struct platform_device *pdev)
 		(struct mpc512x_psc_fifo *)(tempp + sizeof(struct mpc52xx_psc));
 
 	mps->irq = platform_get_irq(pdev, 0);
+	if (mps->irq < 0)
+		return mps->irq;
+
 	ret = devm_request_irq(dev, mps->irq, mpc512x_psc_spi_isr, IRQF_SHARED,
 				"mpc512x-psc-spi", mps);
 	if (ret)

drivers/spi/spi-mpc52xx-psc.c

@@ -328,6 +328,9 @@ static int mpc52xx_psc_spi_of_probe(struct platform_device *pdev)
 	mps->fifo = ((void __iomem *)mps->psc) + sizeof(struct mpc52xx_psc);
 
 	mps->irq = platform_get_irq(pdev, 0);
+	if (mps->irq < 0)
+		return mps->irq;
+
 	ret = devm_request_irq(dev, mps->irq, mpc52xx_psc_spi_isr, 0,
 			       "mpc52xx-psc-spi", mps);
 	if (ret)