windcharger: enable ath79_wdt driver

Change-Id: I2e0168929202ee410c6c70df31e47854d2a0d41e
diff --git a/arch/mips/configs/gfwc100_defconfig b/arch/mips/configs/gfwc100_defconfig
index a72fbc3..2707aef 100644
--- a/arch/mips/configs/gfwc100_defconfig
+++ b/arch/mips/configs/gfwc100_defconfig
@@ -193,7 +193,7 @@
 CONFIG_HWMON=y
 CONFIG_SENSORS_LM95071=y
 CONFIG_WATCHDOG=y
-CONFIG_ATH79_WDT=m
+CONFIG_ATH79_WDT=y
 # CONFIG_HID_SUPPORT is not set
 CONFIG_USB=m
 # CONFIG_USB_DEVICE_CLASS is not set