Merge tag 'irqchip-core-3.18-2' of git://git.infradead.org/users/jcooper/linux into irq/core

irqchip core changes for v3.18 (round 2) from Jason Cooper

 * atmel:
    - Add sama5d4 support
    - Correct # irqs for sama5d3
 * broadcom:
    - Add bcm7120 l2 interrupt controller and DT binding
 * gic-v3:
    - Add CPU PM notifier
    - Add enable/disable support to gic_enable_redist