PCI: Add MSI masking quirk for Nvidia ION AHCI

The ION AHCI device pretends that MSI masking isn't a thing, while it
actually implements it and needs MSIs to be unmasked to work. Add a quirk
to that effect.

Reported-by: Rui Salvaterra <[e-mail]>
Signed-off-by: Marc Zyngier <[e-mail]>
Signed-off-by: Thomas Gleixner <[e-mail]>
Tested-by: Rui Salvaterra <[e-mail]>
Reviewed-by: Thomas Gleixner <[e-mail]>
Cc: Bjorn Helgaas <[e-mail]>
Link: https://lore.kernel.org/r/CALjTZvbzYfBuLB+H=fj2J+9=[e-mail]
Link: https://lore.kernel.org/r/[e-mail]

drivers/pci/quirks.c

···
 			 pci_fixup_pericom_acs_store_forward);
 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_PERICOM, 0x2303,
 			 pci_fixup_pericom_acs_store_forward);
+
+static void nvidia_ion_ahci_fixup(struct pci_dev *pdev)
+{
+	pdev->dev_flags |= PCI_DEV_FLAGS_HAS_MSI_MASKING;
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NVIDIA, 0x0ab8, nvidia_ion_ahci_fixup);