ASoC: sdw-mockup: Add endianness flag in snd_soc_component_driver

The endianness flag is used on the CODEC side to specify an
ambivalence to endian, typically because it is lost over the hardware
link. This device receives audio over a SoundWire DAI and as such
should have endianness applied.
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20220504170905.332415-39-ckeepax@opensource.cirrus.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/sdw-mockup.c

@@ -38,6 +38,7 @@ static void sdw_mockup_component_remove(struct snd_soc_component *component)
 static const struct snd_soc_component_driver snd_soc_sdw_mockup_component = {
 	.probe = sdw_mockup_component_probe,
 	.remove = sdw_mockup_component_remove,
+	.endianness = 1,
 };
 
 static int sdw_mockup_set_sdw_stream(struct snd_soc_dai *dai, void *sdw_stream,