drivers: watchdog: wdt_sam: use the generic disable option

Use the generic option WDT_DISABLE_AT_BOOT instead of the SAM specific
one WDT_SAM_DISABLE_AT_BOOT (note the generic one has been introduced
after the SAM one).

This also have the consequence of changing the default value for yes to
no, fixing the watchdog tests.

Fixes #13290

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2 files changed