ASoC/SOF/Intel/AMD: cleanups for GCC11 -fanalyzer

Merge series from Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>:

GCC11 provides an '-fanalyzer' static analysis option which does not
provide too many false-positives. This patch cleans-up known
problematic code paths to help enable this capability in CI. We've
used this for about a month already.