ASoC: qcom: sm8250: Add Fairphone 4 soundcard compatible

Add a compatible for the SM7225-based Fairphone 4 which can use this
machine driver.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Link: https://patch.msgid.link/20250723-fp4-usb-audio-offload-v3-3-6be84ed4fc39@fairphone.com


Signed-off-by: Mark Brown <broonie@kernel.org>