bootstd: Correct default boot command

The patch to relax flag requirements was not accepted[1], so we still have
to have separate bootcommands depending on CMD_BOOTFLOW_FULL.

The previous attempt at this did not work, since it used the wrong name
for the options.

Fix this and change the message to mention BOOTSTD_FULL since this affects
not just the flags, but all functionality, so is more likely what the user
wants.

Drop the useless condition on CMD_BOOTFLOW_FULL while we are here.

[1] https://patchwork.ozlabs.org/project/uboot/patch/20230329071655.1959513-2-sjg@chromium.org/

Signed-off-by: Simon Glass <sjg@chromium.org>
Fixes: a91492b6e9c ("bootstd: Provide a default command")
diff --git a/boot/Kconfig b/boot/Kconfig
index 9882812..fad8e53 100644
--- a/boot/Kconfig
+++ b/boot/Kconfig
@@ -1554,8 +1554,8 @@
 config BOOTCOMMAND
 	string "bootcmd value"
 	depends on USE_BOOTCOMMAND && !USE_DEFAULT_ENV_FILE
-	default "bootflow scan -lb" if BOOTSTD_BOOTCOMMAND && CMD_BOOTFLOW_FULL
-	default "bootflow scan" if BOOTSTD_BOOTCOMMAND && !CMD_BOOTFLOW_FULL
+	default "bootflow scan -lb" if BOOTSTD_DEFAULTS && CMD_BOOTFLOW_FULL
+	default "bootflow scan" if BOOTSTD_DEFAULTS && !CMD_BOOTFLOW_FULL
 	default "run distro_bootcmd" if !BOOTSTD_BOOTCOMMAND && DISTRO_DEFAULTS
 	help
 	  This is the string of commands that will be used as bootcmd and if