CVE-2022-50426 remoteproc: imx_dsp_rproc: Add mutex protection for workqueue

In the Linux kernel, the following vulnerability has been resolved: remoteproc: imxdsprproc: Add mutex protection for workqueue The workqueue may execute late even after remoteproc is stopped or stopping, some resources rpmsg device and endpoint have been released in rprocstopsubdevices, then...