staging: vchiq_arm: Stop kthreads if vchiq cdev register fails

In case the vchiq character device cannot be registered during probe,
all kthreads needs to be stopped to avoid resource leaks.

Fixes: 863a756a ("staging: vc04_services: vchiq_core: Stop kthreads on vchiq module unload")
Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Link: https://lore.kernel.org/r/20250309125014.37166-4-wahrenst@gmx.net


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