Rename SPL_WATCHDOG_SUPPORT to SPL_WATCHDOG

Rename this option so that CONFIG_IS_ENABLED can be used with it.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/configs/imx8mq_evk.h b/include/configs/imx8mq_evk.h
index 302c458..bf385be 100644
--- a/include/configs/imx8mq_evk.h
+++ b/include/configs/imx8mq_evk.h
@@ -19,7 +19,7 @@
 
 #ifdef CONFIG_SPL_BUILD
 /*#define CONFIG_ENABLE_DDR_TRAINING_DEBUG*/
-#define CONFIG_SPL_WATCHDOG_SUPPORT
+#define CONFIG_SPL_WATCHDOG
 #define CONFIG_SPL_DRIVERS_MISC_SUPPORT
 #define CONFIG_SPL_POWER
 #define CONFIG_SPL_I2C_SUPPORT