drivers: wdt_gecko: wdt opt pause in sleep also in EM1 mode

default watchdog initialization disable counting in EM1, EM2 and EM3
modes. If user use the WDT_OPT_PAUSE_IN_SLEEP flag via the watchdog api,
all 3 EM modes must take this flag into account to avoid wdt count
being frozen if we don't want to.

Signed-off-by: Adrien MARTIN <adrienmar@kickmaker.net>

Author: Adrien MARTIN

drivers/watchdog/wdt_gecko.c

@@ -98,6 +98,10 @@ static int wdt_gecko_setup(const struct device *dev, uint8_t options)
 		return -EINVAL;
 	}
 
+#if defined(_WDOG_CFG_EM1RUN_MASK)
+	data->wdog_config.em1Run =
+		(options & WDT_OPT_PAUSE_IN_SLEEP) == 0U;
+#endif
 	data->wdog_config.em2Run =
 		(options & WDT_OPT_PAUSE_IN_SLEEP) == 0U;
 	data->wdog_config.em3Run =