watchdog: move watchdog_disable_all_cpus() outside of ifdef

watchdog: move watchdog_disable_all_cpus() outside of ifdef

Move watchdog_disable_all_cpus() outside of the ifdef so that it is
available if CONFIG_SYSCTL is not defined.  This is preparation for
"watchdog: implement error handling in update_watchdog_all_cpus() and
callers".

Signed-off-by: Ulrich Obergfell <[email protected]>
Reviewed-by: Aaron Tomlin <[email protected]>
Acked-by: Don Zickus <[email protected]>
Cc: Ulrich Obergfell <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>