ASoC: topology: Check for dapm widget completeness

Add sanity checks to make sure the data is read within file boundary.
Helps in situations where file is only partially copied or malformed.

Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20211015161257.27052-4-cezary.rojewski@intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>