raspberrypi inclusion
category: feature
bugzilla: 50432

--------------------------------

Configuring HDMI audio registers in prepare allows us to take
IEC958 bits into account which are set by the alsa hook after
the hw_params call.
Signed-off-by: NMatthias Reichl <hias@horus.com>
Signed-off-by: NFang Yafen <yafen@iscas.ac.cn>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>