ASoC: Intel: avs: Gather remaining logs on strace_release()

When user closes the tracer, some logs may still remain in the tail of
the buffer as firmware sends LOG_BUFFER_STATUS notification only when
certain threshold of data is reached. Add whatever is left to already
gathered logs so no information is lost.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20221202152841.672536-15-cezary.rojewski@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>