arm64: dts: juno: align pl330 node name with dtschema

Fixes dtbs_check warning:

  dma@7ff00000: $nodename:0: 'dma@7ff00000' does not match '^dma-controller(@.*)?$'

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20220129175621.299254-1-krzysztof.kozlowski@canonical.com