ssb-pcicore: Fix IRQ-vector init on embedded devices

Index: wireless-testing/drivers/ssb/driver_pcicore.c
===================================================================
@@ -537,6 +537,13 @@ int ssb_pcicore_dev_irqvecs_enable(struc
 	int err = 0;
 	u32 tmp;
 
+	if (dev->bus->bustype != SSB_BUSTYPE_PCI) {
+		/* This SSB device is not on a PCI host-bus. So the IRQs are
+		 * not routed through the PCI core.
+		 * So we must not enable routing through the PCI core. */
+		goto out;
+	}
+
 	if (!pdev)
 		goto out;
 	bus = pdev->bus;