Fixes dtbs_check warnings like:

  dmac@ff240000: $nodename:0: 'dmac@ff240000' does not match '^dma-controller(@.*)?$'
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20220129175429.298836-1-krzysztof.kozlowski@canonical.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>