i.MX: Fix inverted register bits in wdt code.

Documentation says for WDA '0: Assert WDOG output.' and for SRS
'0: Assert system reset signal.'.

Signed-off-by: Roman Kapl <rka@sysgo.com>
Message-id: 20200207095409.11227-1-rka@sysgo.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

hw/misc/imx2_wdt.c

@@ -29,7 +29,7 @@ static void imx2_wdt_write(void *opaque, hwaddr addr,
                            uint64_t value, unsigned int size)
 {
     if (addr == IMX2_WDT_WCR &&
-        (value & (IMX2_WDT_WCR_WDA | IMX2_WDT_WCR_SRS))) {
+        (~value & (IMX2_WDT_WCR_WDA | IMX2_WDT_WCR_SRS))) {
         watchdog_perform_action();
     }
 }