rockchip: make NIC name predictable for LinkEase EasePi R1

rockchip: make NIC name predictable for LinkEase EasePi R1

The probe order for PCIe buses and devices is non-deterministic,
making the names eth2 and eth3 unpredictable (they may be swapped).

This patch fixes the names by referencing the device path using
`ucidef_set_network_device_path`.

This patch ensures that the OpenWrt interface name matches the case label.

Fixes: 8ca4caacd039 ("rockchip: Add support for RK3568 LinkEase EasePi R1")
Signed-off-by: Liangbin Lian <jjm2473@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/20779
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>