ASoC: SOF: ipc4-topology: free memories allocated in sof_ipc4_get_audio_fmt

Free the memories allocated in sof_ipc4_get_audio_fmt in error handling
and ipc_free()

Fixes: 2cabd02b ("ASoC: SOF: ipc4-topology: Add support for parsing AIF_IN/AIF_OUT widgets")
Fixes: abfb536b ("ASoC: SOF: ipc4-topology: Add support for parsing DAI_IN/DAI_OUT widgets")
Fixes: 4f838ab2 ("ASoC: SOF: ipc4-topology: Add support for parsing and preparing pga widgets")
Fixes: 4d4ba014

 ("ASoC: SOF: ipc4-topology: Add support for parsing mixer widgets")
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Signed-off-by: Libin Yang <libin.yang@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20220708200516.26853-3-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>