dt-bindings: interrupt-controller: Add suniv interrupt-controller

Add compatible string for Alwinner suniv F1C100s SoC interrupt
controller which is stripped version of sun4i

Signed-off-by: Mesih Kilinc <mesihkilinc@gmail.com>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>