dt-bindings: fix example of allwinner interrupt controller

The documented value of #interrupt-cells is 1.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
ARM: sun6i: Add SMP support for the Allwinner A31

The A31 is a quad Cortex-A7. Add the logic to use the IPs used to
control the CPU configuration and the CPU power so that we can bring up
secondary CPUs at boot.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>