arm64: dts: freescale: Fix 'interrupt-map' parent address cells

The 'interrupt-map' in several Layerscape SoCs is malformed. The
'#address-cells' size of the parent interrupt controller (the GIC) is not
accounted for.

Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Li Yang <leoyang.li@nxp.com>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Li Yang <leoyang.li@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>