i2c: designware-pci: Fix BUG_ON during device removal

Function i2c_dw_pci_remove() -> pci_free_irq_vectors() ->
pci_disable_msi() -> free_msi_irqs() will throw a BUG_ON() for MSI
enabled device since the driver has not released the requested IRQ before
calling the pci_free_irq_vectors().

Here driver requests an IRQ using devm_request_irq() but automatic
release happens only after remove callback. Fix this by explicitly
freeing the IRQ before calling pci_free_irq_vectors().

Fixes: 21aa3983d619 ("i2c: designware-pci: Switch over to MSI interrupts")
Cc: [e-mail] # v5.4+
Signed-off-by: Jarkko Nikula <[e-mail]>
Reviewed-by: Andy Shevchenko <[e-mail]>
Signed-off-by: Wolfram Sang <[e-mail]>

drivers/i2c/busses/i2c-designware-pcidrv.c

···
 	pm_runtime_get_noresume(&pdev->dev);
 
 	i2c_del_adapter(&dev->adapter);
+	devm_free_irq(&pdev->dev, dev->irq, dev);
 	pci_free_irq_vectors(pdev);
 }