Provide helper functions and use them to free dtexts and dvalues in
topology. This is followup cleanup after related changes in this area as
suggested in:
https://mailman.alsa-project.org/pipermail/alsa-devel/2019-January/144761.htmlSigned-off-by: NAmadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Reviewed-by: NPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: NMark Brown <broonie@kernel.org>