media: atomisp: Removed unused HAS_WATCHDOG_SP_THREAD_DEBUG debug

Since the debug codes around #ifdef HAS_WATCHDOG_SP_THREAD_DEBUG are
no longer used, the debug implementation of this can be removed.

Link: https://lore.kernel.org/r/20230619052453.48598-3-hpa@redhat.com



Signed-off-by: Kate Hsuan <hpa@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>