MIPS: OCTEON: Add OCTEON_IRQ_* definitions for cn68XX chips.

There are 64 workqueue, 32 watchdog, and 4 mbox.
Signed-off-by: NDavid Daney <david.daney@cavium.com>

arch/mips/include/asm/mach-cavium-octeon/irq.h

@@ -21,10 +21,11 @@ enum octeon_irq {
 	OCTEON_IRQ_TIMER,
 /* sources in CIU_INTX_EN0 */
 	OCTEON_IRQ_WORKQ0,
-	OCTEON_IRQ_WDOG0 = OCTEON_IRQ_WORKQ0 + 16,
-	OCTEON_IRQ_WDOG15 = OCTEON_IRQ_WDOG0 + 15,
-	OCTEON_IRQ_MBOX0 = OCTEON_IRQ_WDOG0 + 16,
+	OCTEON_IRQ_WDOG0 = OCTEON_IRQ_WORKQ0 + 64,
+	OCTEON_IRQ_MBOX0 = OCTEON_IRQ_WDOG0 + 32,
 	OCTEON_IRQ_MBOX1,
+	OCTEON_IRQ_MBOX2,
+	OCTEON_IRQ_MBOX3,
 	OCTEON_IRQ_PCI_INT0,
 	OCTEON_IRQ_PCI_INT1,
 	OCTEON_IRQ_PCI_INT2,