ASoC: Intel: avs: Fix parsing UUIDs in topology

Use correct type for parsing UUIDs, this eliminates warning present,
when compiling with W=1.

Fixes: 34ae2cd5 ("ASoC: Intel: avs: Add topology parsing infrastructure")
Reported-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20220610124257.4160658-1-amadeuszx.slawinski@linux.intel.com


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