Kconfig: Move misc boot options under 'boot options'

There are a number of miscellaneous boot images at the top level of the
kconfig menu. Move these into the 'boot options' menu.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/common/Kconfig.boot b/common/Kconfig.boot
index 058e62a..6f66b89 100644
--- a/common/Kconfig.boot
+++ b/common/Kconfig.boot
@@ -824,4 +824,57 @@
 
 endmenu
 
+config USE_BOOTARGS
+	bool "Enable boot arguments"
+	help
+	  Provide boot arguments to bootm command. Boot arguments are specified
+	  in CONFIG_BOOTARGS option. Enable this option to be able to specify
+	  CONFIG_BOOTARGS string. If this option is disabled, CONFIG_BOOTARGS
+	  will be undefined and won't take any space in U-Boot image.
+
+config BOOTARGS
+	string "Boot arguments"
+	depends on USE_BOOTARGS && !USE_DEFAULT_ENV_FILE
+	help
+	  This can be used to pass arguments to the bootm command. The value of
+	  CONFIG_BOOTARGS goes into the environment value "bootargs". Note that
+	  this value will also override the "chosen" node in FDT blob.
+
+config USE_BOOTCOMMAND
+	bool "Enable a default value for bootcmd"
+	help
+	  Provide a default value for the bootcmd entry in the environment.  If
+	  autoboot is enabled this is what will be run automatically.  Enable
+	  this option to be able to specify CONFIG_BOOTCOMMAND as a string.  If
+	  this option is disabled, CONFIG_BOOTCOMMAND will be undefined and
+	  won't take any space in U-Boot image.
+
+config BOOTCOMMAND
+	string "bootcmd value"
+	depends on USE_BOOTCOMMAND && !USE_DEFAULT_ENV_FILE
+	default "run distro_bootcmd" if DISTRO_DEFAULTS
+	help
+	  This is the string of commands that will be used as bootcmd and if
+	  AUTOBOOT is set, automatically run.
+
+config USE_PREBOOT
+	bool "Enable preboot"
+	help
+	  When this option is enabled, the existence of the environment
+	  variable "preboot" will be checked immediately before starting the
+	  CONFIG_BOOTDELAY countdown and/or running the auto-boot command resp.
+	  entering interactive mode.
+
+	  This feature is especially useful when "preboot" is automatically
+	  generated or modified. For example, the boot code can modify the
+	  "preboot" when a user holds down a certain combination of keys.
+
+config PREBOOT
+	string "preboot default value"
+	depends on USE_PREBOOT && !USE_DEFAULT_ENV_FILE
+	default "usb start" if USB_KEYBOARD || USB_STORAGE
+	default ""
+	help
+	  This is the default of "preboot" environment variable.
+
 endmenu		# Booting