[PATCH 10/24] binman: Update docs to indicate mkimage is supported

[Simon Glass]

Now that there is a mkimage entry-type, update the docs to remove the
future reference.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 tools/binman/binman.rst | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Applied to u-boot-dm, thanks!