As the devm_kcalloc may return NULL, the return value needs to be checked
to avoid NULL poineter dereference.

Fixes: 24caf8d9 ("ASoC: qcom: lpass-sc7180: Add platform driver for lpass audio")
Signed-off-by: Yuan Can <yuancan@huawei.com>
Link: https://lore.kernel.org/r/20221124140510.63468-1-yuancan@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>