examples: dts: Update example dts for zcu102 and kv260 to work with zephyr rpmsg_multi_services demo

[tnmysh]

zephyr dts for xilinx mailbox is here: https://github.com/zephyrproject-rtos/zephyr/blob/main/dts/arm/xilinx/zynqmp_rpu.dtsi#L35

Current example dts for zcu102 does not contain counter part of this node.
Currently lockstep mode is supported only for zephyr. So, lockstep mode dts need to be updated to make zephyr demo work on zcu102.

Also, kv260 device-tree needs to be pushed from latest petalinux.

[tnmysh]

@wmamills, @uLipe FYI.

[tnmysh]

@wmamills are we still planning to run baremetal firmware as part of CI ? Or only zephyr firmware for zynqmp platforms?

I would like to change IPI node that is used to communicate with Remote core in dts. After that current baremetal firmware binaries won't work, we will have to update it. Is that ok?

[wmamills]

I would like to run baremetal also but they can be new binaries. We don't need to run the old ones.
Does that help?

If that is not possible we can start with just Zephyr.

[tnmysh]

Ok, first we target zephyr. Once it's done we can update baremetal binaries..

[tnmysh]

@wmamills, here is the PR for kv260 starter kit dts: #30

[tnmysh]

@wmamills I can't bring-up ethernet port on kv260 board. I wanted to check with you if ethernet is working on your side?
This makes it difficult to look at kernel logs once r5 zephyr firmware starts as uart 1 is taken by r5.

[uLipe]

Just to provide information, the ethernet port should shows up, I can access my kv260
board through ssh.

[tnmysh]

@uLipe what dts are you using? Also, anything special you need to mention on u-boot command line?

[tnmysh]

so, I can see eth0 interface, but don't see IP address assigned to it:

[tnmysh]

I got it, I think there was connection problem.