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

Fixes dtbs_check warnings like:

  dma@c1128000: $nodename:0: 'dma@c1128000' does not match '^dma-controller(@.*)?$'

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Acked-by: Chanho Min <chanho.min@lge.com>
Link: https://lore.kernel.org/r/20220129175514.298942-2-krzysztof.kozlowski@canonical.com