ASoC: qdsp6: fix a use after free bug in open()

This code frees "graph" and then dereferences to save the error code.
Save the error code first and then use gotos to unwind the allocation.

Fixes: 59716aa3

 ("ASoC: qdsp6: Fix an IS_ERR() vs NULL bug")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20211217150007.GB16611@kili
Signed-off-by: Mark Brown <broonie@kernel.org>