ARM: dts: rockchip: use generic node name for dma rk3036/rk322x

The node names should be generic, so fix this for the rk3036 and
rk322x dma node and rename it to "dma-controller".

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220331125644.6841-1-jbx6244@gmail.com


Signed-off-by: Heiko Stuebner <heiko@sntech.de>