ASoC: atmel: tse850-pcm5142: Use SOC_SINGLE_EXT() helper macro

The TSE850_DAPM_SINGLE_EXT() macro is an identical duplicate of the
core SOC_SINGLE_EXT() marco. Use the macro provided by the core.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://patch.msgid.link/20250303171424.444556-10-ckeepax@opensource.cirrus.com


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