Commit 29ca10e537 ("ipq806x: remove support for kernel 4.19") moved
DTS files to "files" directory, but after that a new DTS file was added
to the former "files-5.4" directory. Move it to the new directory.
Fixes: 98b86296e6 ("ipq806x: add support for ASRock G10")
Signed-off-by: Sungbo Eo <mans0n@gorani.run>
cbccc2560c