arm/versatile: Fix versatile irq specifications.

Two of the versatile irq definitions are incorrect, mostly because two
devices have connections to more than one interrupt controller. Fix them
by using the new interrupts-extended property to fan out without using
an awful interrupt-map nexus node.

Signed-off-by: Grant Likely <grant.likely@linaro.org>

diff --cc arch/arm/boot/dts/versatile-ab.dts
Simple merge

diff --cc arch/arm/boot/dts/versatile-pb.dts
Simple merge