Revert "staging: vc04_services: vchiq_core: Stop kthreads on shutdown"

This reverts commit d9c60bad.

It has been reported that stopping kthreads corrupts the VC04 firmware
and creates issues at boot time [1].

A fix-up version of this patch
bac670144384 ("staging: vc04_services: Stop kthreads on .remove") [2]
was also attempted but it also doesn't properly fix the TODO
(i.e. clean module unload) and similar errors were observed when
stopping these khthreads on RaspberryPi 3.

Hence, revert the entire patch for now since it is not very clear why
stopping the kthreads breaks the firmware.

[1]: https://lore.kernel.org/linux-staging/CAPY8ntBaz_RGr2sboQqbuUv+xZNfRct6-sckDLYPTig_HWyXEw@mail.gmail.com/t/#me90b9a9bc91599f18cd65ceb7eedd40e5fee0cdd

[2]: https://lore.kernel.org/linux-staging/171161507013.3072637.12125782507523919379@ping.linuxembedded.co.uk/T/#m1d3de7d2fa73b2447274858353bbd4a0c3a8ba14



Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Stefan Wahren <wahrenst@gmx.net>
Link: https://lore.kernel.org/r/20240403052100.2794-1-umang.jain@ideasonboard.com


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