arm64: dts: qcom: qrb2210-rb1: add HDMI/I2S audio playback support

arm64: dts: qcom: qrb2210-rb1: add HDMI/I2S audio playback support

Add sound node and aDSP-related pieces to enable HDMI+I2S audio playback
support on Qualcomm QR2210 RB1 board. That is the only sound output
supported for now.

The audio playback is verified using the following commands:
amixer -c0 cset iface=MIXER,name='SEC_MI2S_RX Audio Mixer MultiMedia1' 1
aplay -D hw:0,0 /usr/share/sounds/alsa/Front_Center.wav

Cc: Srinivas Kandagatla <srini@kernel.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Alexey Klimov <alexey.klimov@linaro.org>
Link: https://lore.kernel.org/r/20251022-rb1_hdmi_audio-v3-3-0d38f777a547@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>