ARM: dts: da850: Add power-domains to CPPI 4.1 node

This adds the power-domains property to CPPI 4.1 node.

The CPPI 4.1 DMA driver uses pm_runtime to manage the clocks,
so it needs this property in order to find and enable the clock
properly.

Reviewed-by: David Lechner <david@lechnology.com>
Tested-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>