Otherwise the "required" property, from UBOOT_DTB_BINARY, will be set to "conf"
and no error will be raised in case of error.
(From OE-Core rev: 080e0dfed710035b2e40187d9d639ecf5ab84be2)
Signed-off-by: Thomas Perrot <thomas.perrot@bootlin.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>