Commit a68c6a2662ec82e01442fdcfef2ebdae87f79700 was a part of a large
refactoring PR. It was merged shortly after the Sony RMT-AA400U IR
file was included into the repository. However, the refactoring did not
properly consider new files being added. So, Sony RMT-AA400U was not
refactored. This commit finally applies the audio naming scheme to it.
832b6b40fa