ASoC: SOF: probes: Replace [0] union members with DECLARE_FLEX_ARRAY()

ASoC: SOF: probes: Replace [0] union members with DECLARE_FLEX_ARRAY()

Replace probes related [0] arrays, all found within unions, with
DECLARE_FLEX_ARRAY() declarations.

Signed-off-by: Jyri Sarha <jyri.sarha@intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20221031105141.19037-2-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>