xhci: Add XHCI_INTEL_HOST quirk

Extracted from commit e3567d2c ("xhci: Add Intel U1/U2 timeout policy.")
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

drivers/usb/host/xhci-pci.c

@@ -105,6 +105,8 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
 	if (pdev->vendor == PCI_VENDOR_ID_AMD)
 		xhci->quirks |= XHCI_TRUST_TX_LENGTH;
 
+	if (pdev->vendor == PCI_VENDOR_ID_INTEL)
+		xhci->quirks |= XHCI_INTEL_HOST;
 	if (pdev->vendor == PCI_VENDOR_ID_INTEL)
 		xhci->quirks |= XHCI_AVOID_BEI;
 	if (pdev->vendor == PCI_VENDOR_ID_INTEL &&

drivers/usb/host/xhci.h

@@ -1492,6 +1492,7 @@ struct xhci_hcd {
 #define	XHCI_SW_BW_CHECKING	(1 << 8)
 #define XHCI_AMD_0x96_HOST	(1 << 9)
 #define XHCI_TRUST_TX_LENGTH	(1 << 10)
+#define XHCI_INTEL_HOST		(1 << 12)
 #define XHCI_SPURIOUS_REBOOT	(1 << 13)
 #define XHCI_COMP_MODE_QUIRK	(1 << 14)
 #define XHCI_AVOID_BEI		(1 << 15)