drm/radeon: change audio enable logic

Disable audio around audio hw setup.  This may avoid
hangs on certain asics.

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

diff --cc drivers/gpu/drm/radeon/dce6_afmt.c
Simple merge

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

diff --cc drivers/gpu/drm/radeon/r600_audio.c
Simple merge

diff --cc drivers/gpu/drm/radeon/r600_hdmi.c
Simple merge

diff --cc drivers/gpu/drm/radeon/radeon.h
Simple merge