ASoC: SOF: ipc3: Add local implementation for handling fw_ready message

ASoC: SOF: ipc3: Add local implementation for handling fw_ready message

The handling of fw_ready is IPC3 specific, move the needed code from the
loader.c to ipc3.c and stop using the sof_ops(sdev)->fw_ready() callback.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Ajit Pandey <ajitkumar.pandey@amd.com>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
Link: https://lore.kernel.org/r/20220421080735.31698-2-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>