drm/radeon: whitespace clean up in radeon_audio.c

Clean up some formatting in radeon_audio.c to be
more consistent with the rest of the driver.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --cc drivers/gpu/drm/radeon/radeon_audio.c
Simple merge