After we added quirk for Lenovo Z50-70 it turns out there are at least
two more systems where WDAT table includes instructions accessing RTC
SRAM. Instead of quirking each system separately, look for such
instructions in the table and automatically prefer iTCO_wdt if found.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=199033Reported-by: NArnold Guy <aurnoldg@gmail.com>
Reported-by: NAlois Nespor <nespor@fssp.cz>
Reported-by: NYury Pakin <zxwarior@gmail.com>
Reported-by: NIhor Chyhin <ihorchyhin@ukr.net>
Signed-off-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>