ASoC: sc7280: Really depends on SOUNDWIRE

The sc7280 driver really does depend on SOUNDWIRE since it calls various
sdw_ functions (eg, sdw_enable_stream(), sdw_prepare_stream()) which do
not have stubs when that is disabled so we can't build with COMPILE_TEST.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220223011913.2753938-1-broonie@kernel.org


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