Sndcard compatible for qrb2210/qcm2290

Merge series from Alexey Klimov <alexey.klimov@linaro.org>:

This is a small patch series that serves as a preparation for
adding HDMI audio playback support on QRB2210 RB1 board.
The patches here are for sound subsystem. The other series
will focus on qcom DT files.

The original series where one of the patches here were taken from is
https://lore.kernel.org/linux-sound/20250302-rb1_hdmi_sound_first-v1-0-81a87ae1503c@linaro.org/
and sndcard compable patch was added as new one.

Signed-off-by: Alexey Klimov <alexey.klimov@linaro.org>
---
Changes in v2:
- rewrote commit description and subjects/titles where applicable;
- switched to SoC-level compatible for qrb2210 sndcard, therefore adjusted
  DT schema changes;
- Link to v1: https://lore.kernel.org/r/20251007-qrb2210-qcm2290-sndcard-v1-0-8222141bca79@linaro.org

---
Alexey Klimov (2):
      ASoC: dt-bindings: qcom,sm8250: add QRB2210 soundcard
      ASoC: qcom: sm8250: add qrb2210-sndcard compatible string

 Documentation/devicetree/bindings/sound/qcom,sm8250.yaml | 1 +
 sound/soc/qcom/sm8250.c                                  | 1 +
 2 files changed, 2 insertions(+)
---
base-commit: fe45352cd106ae41b5ad3f0066c2e54dbb2dfd70
change-id: 20251007-qrb2210-qcm2290-sndcard-da54245aae3f

Best regards,
--
Alexey Klimov <alexey.klimov@linaro.org>