irqchip/davinci: Remove leftover header

Commit fa8dede ("irqchip: remove davinci aintc driver") removed the
davinci aintc driver but left behind the associated header. Remove it
now.

Fixes: fa8dede ("irqchip: remove davinci aintc driver")
Signed-off-by: Bartosz Golaszewski <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Link: https://lore.kernel.org/all/[email protected]

Author: Bartosz Golaszewski