CVE-2025-68233

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

drm/tegra: Add call to put_pid()

Add a call to put_pid() corresponding to get_task_pid().
host1x_memory_context_alloc() does not take ownership of the PID so we
need to free it here to avoid leaking.

[mperttunen@nvidia.com: reword commit message]