ASoC: SOF: topology: parse comp_ext_tokens for all widgets

ASoC: SOF: topology: parse comp_ext_tokens for all widgets

Parse comp_ext_tokens in the common sof_widget_ready(), and the
swidget->comp_ext will be used to construct the COMP_NEW ipc in the
subsequent commits.

Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20200904132744.1699575-5-kai.vehmanen@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>