modules: hal_nordic: nrfx: Use owned-channels property for DPPIC

The `owned-channels` property specifies which channels are assigned to
a given target. Additionally, the `source-channels` or `sink-channels`
property defines channels that can be used to forward an event outside
the DPPI domain, otherwise they can only be used within it.

Signed-off-by: Adam Kondraciuk <adam.kondraciuk@nordicsemi.no>