usb: isp1760: Remove duplicate usb_disabled() check

Both isp1760_register() and isp1761_pci_probe() check whether USB is
disabled by calling usb_disabled(), and bail out with an error if it is.
One check is enough, remove the PCI-specific check.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/isp1760/isp1760-if.c

@@ -126,9 +126,6 @@ static int isp1761_pci_probe(struct pci_dev *dev,
 	unsigned int devflags = 0;
 	int ret;
 
-	if (usb_disabled())
-		return -ENODEV;
-
 	if (!dev->irq)
 		return -ENODEV;