ASoC: Intel: Delete message when IPC timeout occurs

This fixes a bug where we dont delete the current message when an
IPC message timeout occurs.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Jie Yang <yang.jie@intel.com>
Signed-off-by: Mark Brown <broonie@linaro.org>