AZL-95166

In the Linux kernel, the following vulnerability has been resolved:

media: vivid: fix cleanup bugs in vivid_init()

When platformdeviceregister() fails in vividinit(), the embedded struct device in vividpdev has already been initialized by deviceinitialize(), but the failure path jumps to freeoutput_strings without dropping the device reference for the current platform device:

vividinit() -> platformdeviceregister(&vividpdev) -> deviceinitialize(&vividpdev.dev) -> setuppdevdmamasks(&vividpdev) -> platformdeviceadd(&vivid_pdev)

This leads to a reference leak when platformdeviceregister() fails. Fix this by calling platformdeviceput() before jumping to the common cleanup path.

Also, the unregdriver label incorrectly calls platformdriverregister() instead of platformdriver_unregister(), which breaks cleanup when workqueue creation fails after successful driver registration. Fix that as well.

The reference leak was identified by a static analysis tool I developed and confirmed by manual review. The incorrect cleanup call was found during code inspection.