mfd: intel-lpss: Don't fail probe on success of pci_alloc_irq_vectors()

The pci_alloc_irq_vectors() returns a positive number on success.
Hence we have to filter the negative numbers for error condition.
Update the check accordingly.

Fixes: e6951fb78787 ("mfd: intel-lpss: Use PCI APIs instead of dereferencing")
Reported-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20231130143206.1475831-1-andriy.shevchenko@linux.intel.comSigned-off-by: Lee Jones <lee@kernel.org>

drivers/mfd/intel-lpss-pci.c

@@ -44,7 +44,7 @@ static int intel_lpss_pci_probe(struct pci_dev *pdev,
 		return ret;
 
 	ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_LEGACY);
-	if (ret)
+	if (ret < 0)
 		return ret;
 
 	info = devm_kmemdup(&pdev->dev, data, sizeof(*info), GFP_KERNEL);