bootstd: Add a bootdev command

Add a 'bootdev' command to handle listing and selection of bootdevs.

Disable standard boot for a few boards which otherwise run out of space.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/cmd/Kconfig b/cmd/Kconfig
index f580797..a5c6918 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -211,6 +211,16 @@
 	 This stage allow to check or modify the image provided
 	 to the bootm command.
 
+config CMD_BOOTDEV
+	bool "bootdev"
+	depends on BOOTSTD
+	default y if BOOTSTD_FULL
+	help
+	  Support listing available bootdevs (boot devices) which can provide an
+	  OS to boot, as well as showing information about a particular one.
+
+	  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