documentation: Add UBOOT_BINARY, extend UBOOT_CONFIG

UBOOT_CONFIG accepts a third parameter for the UBOOT_BINARY that isn't
documented. To show its usage another example from the meta-freescale layer
was picked.

(From yocto-docs rev: aba67b58711019a6ba439b2b77337f813ed799ac)

Signed-off-by: Jörg Sommer <joerg.sommer@navimatix.de>
Reviewed-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/documentation/ref-manual/classes.rst b/documentation/ref-manual/classes.rst
index 0677157b3b..216b236e33 100644
--- a/documentation/ref-manual/classes.rst
+++ b/documentation/ref-manual/classes.rst
@@ -3131,7 +3131,7 @@ The :ref:`ref-classes-uboot-config` class provides support for U-Boot configurat
 a machine. Specify the machine in your recipe as follows::
 
    UBOOT_CONFIG ??= <default>
-   UBOOT_CONFIG[foo] = "config,images"
+   UBOOT_CONFIG[foo] = "config,images,binary"
 
 You can also specify the machine using this method::