arm: dts: k3-am625-verdin-wifi-dev-u-boot.dtsi: Fix DMA/Ethernet

Update main_bcdma and main_pktdma nodes for native configuration in the
absence of DM services. u-boot k3-udma driver expects these additional
register fields else probe will fail.

Reported-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Roger Quadros <rogerq@kernel.org>
Reviewed-by: Nishanth Menon <nm@ti.com>
Tested-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>