ARM: 7349/1: integrator: convert to sparse irqs

This converts the Integrator AP/CP to use sparse IRQs.
Tested on both machines.

Acked-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>