drivers/usb/host/ehci-fsl: Fix interrupt setup in host mode.

In patch a1a2b71 (Drop static setup of IRQ resource from DT
core) we stopped platform_get_resource() from returning the IRQ, as all
drivers were supposed to have switched to platform_get_irq()
Unfortunately the Freescale EHCI driver in host mode got missed. Fix
it.

Fixes: a1a2b71 ("of/platform: Drop static setup of IRQ resource from DT core")
Reported-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Suggested-by: Rob Herring <robh@kernel.org>
Tested-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Darren Stevens <darren@stevens-zone.net>
Link: https://lore.kernel.org/r/20220702220355.63b36fb8@Cyrus.lan
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: Darren Stevens

drivers/usb/host/ehci-fsl.c

@@ -76,14 +76,9 @@ static int fsl_ehci_drv_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
-	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	if (!res) {
-		dev_err(&pdev->dev,
-			"Found HC with no IRQ. Check %s setup!\n",
-			dev_name(&pdev->dev));
-		return -ENODEV;
-	}
-	irq = res->start;
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
 
 	hcd = __usb_create_hcd(&fsl_ehci_hc_driver, pdev->dev.parent,
 			       &pdev->dev, dev_name(&pdev->dev), NULL);

drivers/usb/host/fsl-mph-dr-of.c

@@ -112,6 +112,9 @@ static struct platform_device *fsl_usb2_device_register(
 			goto error;
 	}
 
+	pdev->dev.of_node = ofdev->dev.of_node;
+	pdev->dev.of_node_reused = true;
+
 	retval = platform_device_add(pdev);
 	if (retval)
 		goto error;