watchdog: Hide WATCHDOG_RESET_DISABLE

This option is only supported by the IMX watchdog and seems to be
similar to CONFIG_WATCHDOG.

Move it below the IMX watchdog and make it dependent on IMX_WATCHDOG.

Signed-off-by: Michael Walle <michael@walle.cc>
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 210d9f8..4532a40 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -21,12 +21,6 @@
 config HW_WATCHDOG
 	bool
 
-config WATCHDOG_RESET_DISABLE
-	bool "Disable reset watchdog"
-	help
-	  Disable reset watchdog, which can let WATCHDOG_RESET invalid, so
-	  that the watchdog will not be fed in u-boot.
-
 config IMX_WATCHDOG
 	bool "Enable Watchdog Timer support for IMX and LSCH2 of NXP"
 	select HW_WATCHDOG if !WDT
@@ -34,6 +28,13 @@
 	  Select this to enable the IMX and LSCH2 of Layerscape watchdog
 	  driver.
 
+config WATCHDOG_RESET_DISABLE
+	bool "Disable reset watchdog"
+	depends on IMX_WATCHDOG
+	help
+	  Disable reset watchdog, which can let WATCHDOG_RESET invalid, so
+	  that the watchdog will not be fed in u-boot.
+
 config OMAP_WATCHDOG
 	bool "TI OMAP watchdog driver"
 	depends on ARCH_OMAP2PLUS