bootstd: Add a bootmeth command

Add a 'bootmeth' command to handle listing and ordering of boot methods.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/cmd/Kconfig b/cmd/Kconfig
index d2ffc53..1205ef5 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -239,6 +239,17 @@
 
 	  This command is not necessary for bootstd to work.
 
+config CMD_BOOTMETH
+	bool "bootmeth"
+	depends on BOOTSTD
+	default y if BOOTSTD_FULL
+	help
+	  Support listing available bootmethds (methods used to boot an
+	  Operating System), as well as selecting the order that the bootmeths
+	  are used.
+
+	  This command is not necessary for bootstd to work.
+
 config BOOTM_EFI
 	bool "Support booting UEFI FIT images"
 	depends on CMD_BOOTEFI && CMD_BOOTM && FIT