ASoC: SOF: ipc4-topology: Use local variables in sof_ipc4_init_input_audio_fmt()

ASoC: SOF: ipc4-topology: Use local variables in sof_ipc4_init_input_audio_fmt()

We have local copies of available_fmt->input_pin_fmts and
available_fmt->num_input_formats, use them in the function.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://patch.msgid.link/20241008110936.22534-3-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>