Merge tag 'at91-cleanup' of git://github.com/at91linux/linux-at91 into next/cleanup

Merge "at91: cleanup for 3.18" from Nicolas Ferre:

First batch of AT91 cleanup for 3.18:
Following the merge of AIC/AIC5 code as standard irqchip drivers during early
3.17 merge window, we can use these drivers for AT91 DT-enabled chips and
boards.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

* tag 'at91-cleanup' of git://github.com/at91linux/linux-at91:
  ARM: at91: remove old irq material
  ARM: at91: make use of the new AIC driver for dt enabled boards
  ARM: at91: enclose at91_aic_xx calls in IS_ENABLED(CONFIG_OLD_IRQ_AT91) blocks
  ARM: at91: introduce OLD_IRQ_AT91 Kconfig option