watchdog: Revert "iTCO_wdt: all versions count down twice"

watchdog: Revert "iTCO_wdt: all versions count down twice"

BugLink: http://bugs.launchpad.net/bugs/1724668
commit fc61e83a29308601e6e8a0759e24fc8fe2122692 upstream.

This reverts commit 1fccb73011ea8a5fa0c6d357c33fa29c695139ea.
Reported as Bug 196509 - iTCO_wdt regression reboot before timeout expire

Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Cc: Martin Wilck <mwilck@suse.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>