bootstd: Rework BLK dependency

The bootstd code itself does not have any dependency on BLK in order to
build. However, in order to minimize size growth of non-migrated
platforms, change this from being "default y" to "default y if BLK".
This will make it easier to begin migration of platforms which do not
have any BLK-class device but do want to use bootstd.

Signed-off-by: Tom Rini <trini@konsulko.com>
1 file changed