Revert "files.arm64: fix sort order for aw_i2s.c"

This reverts commit 25fb4fb2518f53b9c986367932d7fa6b7b6697ec.

This MFC was done prematurely as aw_i2s is not stable/13 yet.

Strangely, git cherry-pick did not complain when applying the diff,
although the line to be removed was not in the patched file.