ARM: ux500: skip GIC CPU and dist address checks

The Ux500 is initializing its IRQs from the device tree and
does not need to figure out any static base addresses anymore,
this is just dead code so delete it.

Cc: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>