CVE-2024-53199 ASoC: imx-audmix: Add NULL check in imx_audmix_probe

In the Linux kernel, the following vulnerability has been resolved: ASoC: imx-audmix: Add NULL check in imxaudmixprobe devmkasprintf can return a NULL pointer on failure,but this returned value in imxaudmixprobe is not checked. Add NULL check in imxaudmixprobe, to handle kernel NULL pointer...