ref-manual: classes: kernel-fitimage: fix source of imagetype

The actual code in kernel-fitimage.bbclass checks if "fitImage" is listed in
KERNEL_IMAGETYPES (see e.g. [1]) which is a merge of KERNEL_IMAGETYPE,
KERNEL_ALT_IMAGETYPE and KERNEL_IMAGETYPES (see [2]).

[1] https://git.yoctoproject.org/poky/tree/meta/classes-recipe/kernel-fitimage.bbclass?h=4.3_M1&id=cc97d775cb402df0d4122bf54eab1a5198c98471#n9
[2] https://git.yoctoproject.org/poky/tree/meta/classes-recipe/kernel.bbclass?h=4.3_M1&id=cc97d775cb402df0d4122bf54eab1a5198c98471#n74

(From yocto-docs rev: a0f79745a80c7a88167d83d905e75e1fcd5f054d)

Signed-off-by: Ulrich Ölmann <u.oelmann@pengutronix.de>
Reviewed-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/documentation/ref-manual/classes.rst b/documentation/ref-manual/classes.rst
index e555a80b5a..6ab80b10b7 100644
--- a/documentation/ref-manual/classes.rst
+++ b/documentation/ref-manual/classes.rst
@@ -1599,8 +1599,8 @@ an optional :term:`Initramfs` bundle, an optional RAM disk, and any number of
 device trees.
 
 To create a FIT image, it is required that :term:`KERNEL_CLASSES`
-is set to include ":ref:`ref-classes-kernel-fitimage`" and :term:`KERNEL_IMAGETYPE`
-is set to "fitImage".
+is set to include ":ref:`ref-classes-kernel-fitimage`" and one of :term:`KERNEL_IMAGETYPE`,
+:term:`KERNEL_ALT_IMAGETYPE` or :term:`KERNEL_IMAGETYPES` to include "fitImage".
 
 The options for the device tree compiler passed to ``mkimage -D``
 when creating the FIT image are specified using the