USB: apple-mfi-fastcharge: Fix use after free in probe

This code frees "mfi" and then derefences it on the next line to get
the error code.

Fixes: b0eec52f ("USB: apple-mfi-fastcharge: Fix kfree after failed kzalloc")
Reviewed-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/X8ik4j8yJitVUyfU@mwanda


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>