arm64: defconfig: Enable the DesignWare watchdog

Enable the DesignWare watchdog driver that is present on the Intel
Stratix10 and Agilex platforms.
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>

arch/arm64/configs/defconfig

@@ -445,6 +445,7 @@ CONFIG_UNIPHIER_THERMAL=y
 CONFIG_WATCHDOG=y
 CONFIG_ARM_SP805_WATCHDOG=y
 CONFIG_S3C2410_WATCHDOG=y
+CONFIG_DW_WATCHDOG=y
 CONFIG_SUNXI_WATCHDOG=m
 CONFIG_IMX2_WDT=y
 CONFIG_IMX_SC_WDT=m