ipq806x: restore recent changes made to 6.6 dts files

ipq806x: restore recent changes made to 6.6 dts files

a33d59f7af8f (2025-10-14) restored dts files for kernel 6.6 to files-6.6
after the preceding 15fa59c41f0d moved files-6.6 to files-6.12 to be
used by the new testing kernel, 6.12. This restoration omitted
1a3f05eb2b8e (2025-10-08), which fixed important aspects of the wifi
device definitions in qcom-ipq8064-eax500.dtsi and
qcom-ipq8064-unifi-ac-hd.dts.

The 1a3f05eb2b8e fix persisted into the 6.12 dts files. This change now
restores it for 6.6. Note that ipq806x is currently using kernel 6.6 for
most purposes, as 6.12 is only in testing status for this target.

This change was prepared with `git diff
a33d59f7af8f:target/linux/ipq806x/files-6.6
15fa59c41f0d^:target/linux/ipq806x/files-6.6`. This identified
c186d17fa518 (2025-10-08) as another change that was not present in the
restored files-6.6, but it has since been superseded by 2a709d108e80
(2025-10-20), so no action is necessary to restore it. There were no
diffs present between these revisions in config-6.6 or patches-6.6,
which were also moved and restored in the 6.12 bring-up.

Signed-off-by: Mark Mentovai <mark@mentovai.com>
Cc: Shiji Yang <yangshiji66@outlook.com>
Cc: Rosen Penev <rosenp@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/20464
Signed-off-by: Robert Marko <robimarko@gmail.com>