ipq40xx: move arch files to 6.12 directory
This is a preparation for 6.12 kernel support. It can help us
track the device tree files history by using the Git tool.
Signed-off-by: Shiji Yang <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/18725
Signed-off-by: Hauke Mehrtens <[email protected]>