Same as the previous patch, but now for handling HDMI audio interrupts.

Changes since v1:
- Preserve the order we write back all registers
Acked-by: NChristian König <christian.koenig@amd.com>
Signed-off-by: NLyude <lyude@redhat.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>