ASoC: Intel: sst-firmware: missing curly braces (harmless)

There were some curly braces intended here, but the code actually
works the same either way so it's not a bug.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Mark Brown <broonie@linaro.org>