ARM: amba: make use of -1 IRQs warn

Make the core warn about the use of -1 (NO_IRQ)
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

drivers/amba/bus.c

@@ -511,6 +511,9 @@ int amba_device_add(struct amba_device *dev, struct resource *parent)
 	void __iomem *tmp;
 	int i, ret;
 
+	WARN_ON(dev->irq[0] == (unsigned int)-1);
+	WARN_ON(dev->irq[1] == (unsigned int)-1);
+
 	ret = request_resource(parent, &dev->res);
 	if (ret)
 		goto err_out;