cmd: Convert CMD_BOOTMENU

Also convert MENU while we're in here.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/common/Kconfig b/common/Kconfig
index 913d21a..a04ee10 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -172,6 +172,12 @@
 
 menu "Console"
 
+config MENU
+	bool
+	help
+	  This is the library functionality to provide a text-based menu of
+	  choices for the user to make choices with.
+
 config CONSOLE_RECORD
 	bool "Console recording"
 	help