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/arch/arm/mach-omap2/am33xx/Kconfig b/arch/arm/mach-omap2/am33xx/Kconfig
index e19dbbb..51316b7 100644
--- a/arch/arm/mach-omap2/am33xx/Kconfig
+++ b/arch/arm/mach-omap2/am33xx/Kconfig
@@ -53,7 +53,7 @@
 	imply SPL_SEPARATE_BSS
 	imply SPL_SERIAL_SUPPORT
 	imply SPL_SYS_MALLOC_SIMPLE
-	imply SPL_WATCHDOG_SUPPORT
+	imply SPL_WATCHDOG
 	imply SPL_YMODEM_SUPPORT
 	help
 	  This option specifies support for the AM335x
@@ -234,7 +234,7 @@
 	imply SPL_NAND_SUPPORT
 	imply SPL_POWER
 	imply SPL_SERIAL_SUPPORT
-	imply SPL_WATCHDOG_SUPPORT
+	imply SPL_WATCHDOG
 	imply SPL_YMODEM_SUPPORT
 	help
 	  This option specifies support for the AM43xx