In a DT, the interrupts of an interrupt-controller are not usable when
#interrupt-cells is missing.

This patch activates the interrupts of the GPIOs 0 and 1 for the Marvell
Dove SoC.
Signed-off-by: NJean-François Moine <moinejf@free.fr>
Signed-off-by: NJason Cooper <jason@lakedaemon.net>