[ Upstream commit 8e9f7265 ]

The q6asm_audio_client_alloc() doesn't return NULL, it returns error
pointers.

Fixes: 2a9e92d3 ("ASoC: qdsp6: q6asm: Add q6asm dai driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>